Microsoft Outlook - Remote Code Execution (RCE)
Microsoft Outlook - Remote Code Execution (RCE)
AI Analysis
Technical Summary
The reported security threat concerns a Remote Code Execution (RCE) vulnerability in Microsoft Outlook. RCE vulnerabilities allow an attacker to execute arbitrary code on a victim's machine remotely, potentially leading to full system compromise. Although specific affected versions are not listed, the vulnerability targets Microsoft Outlook, a widely used email client in both enterprise and personal environments. The exploit is documented in Exploit-DB with ID 52356 and includes publicly available exploit code written in Python, indicating that proof-of-concept code exists and could be leveraged by attackers to automate exploitation. The lack of patch links suggests that either a patch has not yet been released or the information was not provided. The exploit likely leverages a flaw in how Outlook processes certain inputs, such as specially crafted emails or attachments, to trigger code execution without user interaction or with minimal interaction. Given the critical severity classification, the vulnerability probably allows attackers to bypass security controls and execute code with the privileges of the logged-in user, potentially enabling data theft, malware installation, or lateral movement within networks. The absence of known exploits in the wild suggests the vulnerability is either newly disclosed or not yet widely weaponized, but the presence of exploit code increases the risk of imminent exploitation attempts.
Potential Impact
For European organizations, this RCE vulnerability in Microsoft Outlook poses a significant risk due to the widespread use of Outlook in corporate environments for email communication. Successful exploitation could lead to unauthorized access to sensitive information, disruption of business operations, and compromise of internal networks. Given the critical nature of the vulnerability, attackers could deploy ransomware, steal intellectual property, or conduct espionage activities. The impact is heightened for sectors with stringent data protection requirements, such as finance, healthcare, and government agencies, where breaches could result in regulatory penalties under GDPR and damage to reputation. Additionally, the potential for lateral movement within networks could facilitate broader attacks beyond the initially compromised endpoint. The lack of a patch at the time of disclosure increases the urgency for organizations to implement interim mitigations to protect their environments.
Mitigation Recommendations
European organizations should immediately implement the following specific measures: 1) Monitor and restrict inbound email attachments and links, employing advanced email filtering solutions that can detect and quarantine suspicious content targeting Outlook vulnerabilities. 2) Employ network segmentation to limit the spread of any compromise originating from an exploited Outlook client. 3) Enforce the principle of least privilege for user accounts to minimize the impact of code execution under compromised credentials. 4) Utilize endpoint detection and response (EDR) tools to identify anomalous behaviors indicative of exploitation attempts. 5) Educate users about the risks of opening unexpected or suspicious emails and attachments, emphasizing vigilance even with emails appearing to come from trusted sources. 6) Regularly back up critical data and verify the integrity of backups to enable recovery in case of ransomware or destructive attacks. 7) Stay alert for official patches or advisories from Microsoft and apply updates promptly once available. 8) Consider deploying application control or sandboxing technologies to restrict the execution of unauthorized code spawned by Outlook processes.
Affected Countries
Germany, France, United Kingdom, Italy, Spain, Netherlands, Belgium, Sweden, Poland, Ireland
Indicators of Compromise
- exploit-code: # Titles: Microsoft Outlook - Remote Code Execution (RCE) # Author: nu11secur1ty # Date: 07/06/2025 # Vendor: Microsoft # Software: https://www.microsoft.com/en-us/microsoft-365/outlook/log-in # Reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-47176 > https://www.cloudflare.com/learning/security/what-is-remote-code-execution/ # CVE-2025-47176 ## Description This proof-of-concept (PoC) demonstrates the CVE-2025-47176 vulnerability simulation. It injects a crafted mail item into Outlook containing a malicious sync path that triggers an action during scanning. **IMPORTANT:** This PoC simulates the vulnerable Outlook path parsing and triggers a **system restart** when the malicious path is detected. --- ## Additional Testing with malicious.prf You can also test this PoC by importing a crafted Outlook Profile File (`malicious.prf`): 1. Place `malicious.prf` in the same folder as `PoC.py`. 2. Run Outlook with the import command: ```powershell & "C:\Program Files\Microsoft Office\root\Office16\OUTLOOK.EXE" /importprf malicious.prf ## Usage 1. Ensure you have Outlook installed and configured on your Windows machine. 2. Run the PoC script with Python 3.x (requires `pywin32` package): ```powershell pip install pywin32 python PoC.py ``` 3. The script will: - Inject a mail item with the malicious sync path. - Wait 10 seconds for Outlook to process the mail. - Scan Inbox and Drafts folders. - Upon detection, normalize the path and trigger a system restart (`shutdown /r /t 5`). --- ## Warning - This script **will restart your computer** after 5 seconds once the payload is triggered. - Save all work before running. - Test only in a controlled or virtualized environment. - Do **NOT** run on production or important systems. --- ## Files - `PoC.py` - The Python proof-of-concept script. - `README.md` - This file. --- ## License This PoC is provided for educational and research purposes only. Use responsibly and ethically. # Video: [href](https://www.youtube.com/watch?v=nac3kUe_d1c) # Source: [href]( https://github.com/nu11secur1ty/CVE-mitre/tree/main/2025/CVE-2025-47176) # Buy me a coffee if you are not ashamed: [href](https://www.paypal.com/donate/?hosted_button_id=ZPQZT5XMC5RFY) # Time spent: 03:35:00 -- System Administrator - Infrastructure Engineer Penetration Testing Engineer Exploit developer at https://packetstormsecurity.com/ https://cve.mitre.org/index.html https://cxsecurity.com/ and https://www.exploit-db.com/ 0day Exploit DataBase https://0day.today/ home page: https://www.nu11secur1ty.com/ hiPEnIMR0v7QCo/+SEH9gBclAAYWGnPoBIQ75sCj60E= nu11secur1ty <http://nu11secur1ty.com/> На нд, 6.07.2025 г. в 10:34 nu11 secur1ty <nu11secur1typentest@gmail.com> написа: > # Titles: Microsoft Outlook Remote Code Execution Vulnerability - ACE > # Author: nu11secur1ty > # Date: 07/06/2025 > # Vendor: Microsoft > # Software: https://www.microsoft.com/en-us/microsoft-365/outlook/log-in > # Reference: > https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-47176 > > https://www.cloudflare.com/learning/security/what-is-remote-code-execution/ > # CVE-2025-47176 > > ## Description > This proof-of-concept (PoC) demonstrates the CVE-2025-47176 vulnerability > simulation. It injects a crafted mail item into Outlook containing a > malicious sync path that triggers an action during scanning. > > **IMPORTANT:** > This PoC simulates the vulnerable Outlook path parsing and triggers a > **system restart** when the malicious path is detected. > > --- > ## Additional Testing with malicious.prf > > You can also test this PoC by importing a crafted Outlook Profile File > (`malicious.prf`): > > 1. Place `malicious.prf` in the same folder as `PoC.py`. > 2. Run Outlook with the import command: > > ```powershell > & "C:\Program Files\Microsoft Office\root\Office16\OUTLOOK.EXE" > /importprf malicious.prf > > > ## Usage > > 1. Ensure you have Outlook installed and configured on your Windows > machine. > 2. Run the PoC script with Python 3.x (requires `pywin32` package): > ```powershell > pip install pywin32 > python PoC.py > ``` > 3. The script will: > - Inject a mail item with the malicious sync path. > - Wait 10 seconds for Outlook to process the mail. > - Scan Inbox and Drafts folders. > - Upon detection, normalize the path and trigger a system restart > (`shutdown /r /t 5`). > > --- > > ## Warning > > - This script **will restart your computer** after 5 seconds once the > payload is triggered. > - Save all work before running. > - Test only in a controlled or virtualized environment. > - Do **NOT** run on production or important systems. > > --- > > ## Files > > - `PoC.py` - The Python proof-of-concept script. > - `README.md` - This file. > > --- > > ## License > > This PoC is provided for educational and research purposes only. > > Use responsibly and ethically. > > > # Reproduce: > [href](https://www.youtube.com/watch?v=yOra0pm8CHg) > > # Source: > [href]( > https://github.com/nu11secur1ty/CVE-mitre/tree/main/2025/CVE-2025-47176) > > # Buy me a coffee if you are not ashamed: > [href](https://www.paypal.com/donate/?hosted_button_id=ZPQZT5XMC5RFY) > > # Time spent: > 03:35:00 > > > -- > System Administrator - Infrastructure Engineer > Penetration Testing Engineer > Exploit developer at https://packetstormsecurity.com/ > https://cve.mitre.org/index.html > https://cxsecurity.com/ and https://www.exploit-db.com/ > 0day Exploit DataBase https://0day.today/ > home page: https://www.nu11secur1ty.com/ > hiPEnIMR0v7QCo/+SEH9gBclAAYWGnPoBIQ75sCj60E= > nu11secur1ty <http://nu11secur1ty.com/> > > На нд, 6.07.2025 г. в 9:53 nu11 secur1ty <nu11secur1typentest@gmail.com> > написа: > >> # Titles: Microsoft Outlook Remote Code Execution Vulnerability - ACE >> # Author: nu11secur1ty >> # Date: 07/06/2025 >> # Vendor: Microsoft >> # Software: https://www.microsoft.com/en-us/microsoft-365/outlook/log-in >> # Reference: >> https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-47176 > >> https://www.cloudflare.com/learning/security/what-is-remote-code-execution/ >> # CVE-2025-47176 >> >> ## Description >> This proof-of-concept (PoC) demonstrates the CVE-2025-47176 vulnerability >> simulation. It injects a crafted mail item into Outlook containing a >> malicious sync path that triggers an action during scanning. >> >> **IMPORTANT:** >> This PoC simulates the vulnerable Outlook path parsing and triggers a >> **system restart** when the malicious path is detected. >> >> --- >> ## Additional Testing with malicious.prf >> >> You can also test this PoC by importing a crafted Outlook Profile File >> (`malicious.prf`): >> >> 1. Place `malicious.prf` in the same folder as `PoC.py`. >> 2. Run Outlook with the import command: >> >> ```powershell >> & "C:\Program Files\Microsoft Office\root\Office16\OUTLOOK.EXE" >> /importprf malicious.prf >> >> >> ## Usage >> >> 1. Ensure you have Outlook installed and configured on your Windows >> machine. >> 2. Run the PoC script with Python 3.x (requires `pywin32` package): >> ```powershell >> pip install pywin32 >> python PoC.py >> ``` >> 3. The script will: >> - Inject a mail item with the malicious sync path. >> - Wait 10 seconds for Outlook to process the mail. >> - Scan Inbox and Drafts folders. >> - Upon detection, normalize the path and trigger a system restart >> (`shutdown /r /t 5`). >> >> --- >> >> ## Warning >> >> - This script **will restart your computer** after 5 seconds once the >> payload is triggered. >> - Save all work before running. >> - Test only in a controlled or virtualized environment. >> - Do **NOT** run on production or important systems. >> >> --- >> >> ## Files >> >> - `PoC.py` - The Python proof-of-concept script. >> - `README.md` - This file. >> >> --- >> >> ## License >> >> This PoC is provided for educational and research purposes only. >> >> Use responsibly and ethically. >> >> >> # Reproduce: >> [href](https://www.youtube.com/watch?v=yOra0pm8CHg) >> >> # Buy me a coffee if you are not ashamed: >> [href](https://www.paypal.com/donate/?hosted_button_id=ZPQZT5XMC5RFY) >> >> # Time spent: >> 03:35:00 >> >> >> -- >> System Administrator - Infrastructure Engineer >> Penetration Testing Engineer >> Exploit developer at https://packetstormsecurity.com/ >> https://cve.mitre.org/index.html >> https://cxsecurity.com/ and https://www.exploit-db.com/ >> 0day Exploit DataBase https://0day.today/ >> home page: https://www.nu11secur1ty.com/ >> hiPEnIMR0v7QCo/+SEH9gBclAAYWGnPoBIQ75sCj60E= >> nu11secur1ty <http://nu11secur1ty.com/> >> >> -- >> >> System Administrator - Infrastructure Engineer >> Penetration Testing Engineer >> Exploit developer at https://packetstorm.news/ >> https://cve.mitre.org/index.html >> https://cxsecurity.com/ and https://www.exploit-db.com/ >> 0day Exploit DataBase https://0day.today/ >> home page: https://www.nu11secur1ty.com/ >> hiPEnIMR0v7QCo/+SEH9gBclAAYWGnPoBIQ75sCj60E= >> nu11secur1ty <http://nu11secur1ty.com/> >> > > > -- > > System Administrator - Infrastructure Engineer > Penetration Testing Engineer > Exploit developer at https://packetstorm.news/ > https://cve.mitre.org/index.html > https://cxsecurity.com/ and https://www.exploit-db.com/ > 0day Exploit DataBase https://0day.today/ > home page: https://www.nu11secur1ty.com/ > hiPEnIMR0v7QCo/+SEH9gBclAAYWGnPoBIQ75sCj60E= > nu11secur1ty <http://nu11secur1ty.com/> > -- System Administrator - Infrastructure Engineer Penetration Testing Engineer Exploit developer at https://packetstorm.news/ https://cve.mitre.org/index.html https://cxsecurity.com/ and https://www.exploit-db.com/ 0day Exploit DataBase https://0day.today/ home page: https://www.nu11secur1ty.com/ hiPEnIMR0v7QCo/+SEH9gBclAAYWGnPoBIQ75sCj60E= nu11secur1ty <http://nu11secur1ty.com/>
Microsoft Outlook - Remote Code Execution (RCE)
Description
Microsoft Outlook - Remote Code Execution (RCE)
AI-Powered Analysis
Technical Analysis
The reported security threat concerns a Remote Code Execution (RCE) vulnerability in Microsoft Outlook. RCE vulnerabilities allow an attacker to execute arbitrary code on a victim's machine remotely, potentially leading to full system compromise. Although specific affected versions are not listed, the vulnerability targets Microsoft Outlook, a widely used email client in both enterprise and personal environments. The exploit is documented in Exploit-DB with ID 52356 and includes publicly available exploit code written in Python, indicating that proof-of-concept code exists and could be leveraged by attackers to automate exploitation. The lack of patch links suggests that either a patch has not yet been released or the information was not provided. The exploit likely leverages a flaw in how Outlook processes certain inputs, such as specially crafted emails or attachments, to trigger code execution without user interaction or with minimal interaction. Given the critical severity classification, the vulnerability probably allows attackers to bypass security controls and execute code with the privileges of the logged-in user, potentially enabling data theft, malware installation, or lateral movement within networks. The absence of known exploits in the wild suggests the vulnerability is either newly disclosed or not yet widely weaponized, but the presence of exploit code increases the risk of imminent exploitation attempts.
Potential Impact
For European organizations, this RCE vulnerability in Microsoft Outlook poses a significant risk due to the widespread use of Outlook in corporate environments for email communication. Successful exploitation could lead to unauthorized access to sensitive information, disruption of business operations, and compromise of internal networks. Given the critical nature of the vulnerability, attackers could deploy ransomware, steal intellectual property, or conduct espionage activities. The impact is heightened for sectors with stringent data protection requirements, such as finance, healthcare, and government agencies, where breaches could result in regulatory penalties under GDPR and damage to reputation. Additionally, the potential for lateral movement within networks could facilitate broader attacks beyond the initially compromised endpoint. The lack of a patch at the time of disclosure increases the urgency for organizations to implement interim mitigations to protect their environments.
Mitigation Recommendations
European organizations should immediately implement the following specific measures: 1) Monitor and restrict inbound email attachments and links, employing advanced email filtering solutions that can detect and quarantine suspicious content targeting Outlook vulnerabilities. 2) Employ network segmentation to limit the spread of any compromise originating from an exploited Outlook client. 3) Enforce the principle of least privilege for user accounts to minimize the impact of code execution under compromised credentials. 4) Utilize endpoint detection and response (EDR) tools to identify anomalous behaviors indicative of exploitation attempts. 5) Educate users about the risks of opening unexpected or suspicious emails and attachments, emphasizing vigilance even with emails appearing to come from trusted sources. 6) Regularly back up critical data and verify the integrity of backups to enable recovery in case of ransomware or destructive attacks. 7) Stay alert for official patches or advisories from Microsoft and apply updates promptly once available. 8) Consider deploying application control or sandboxing technologies to restrict the execution of unauthorized code spawned by Outlook processes.
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Technical Details
- Edb Id
- 52356
- Has Exploit Code
- true
- Code Language
- python
Indicators of Compromise
Exploit Source Code
Exploit code for Microsoft Outlook - Remote Code Execution (RCE)
# Titles: Microsoft Outlook - Remote Code Execution (RCE) # Author: nu11secur1ty # Date: 07/06/2025 # Vendor: Microsoft # Software: https://www.microsoft.com/en-us/microsoft-365/outlook/log-in # Reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-47176 > https://www.cloudflare.com/learning/security/what-is-remote-code-execution/ # CVE-2025-47176 ## Description This proof-of-concept (PoC) demonstrates the CVE-2025-47176 vulnerability simulation. It injects a crafted mail it... (9507 more characters)
Threat ID: 686e74f66f40f0eb72042dde
Added to database: 7/9/2025, 1:56:06 PM
Last enriched: 7/9/2025, 1:56:58 PM
Last updated: 7/9/2025, 1:56:58 PM
Views: 2
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