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, a widely used email client within the Microsoft Office suite. RCE vulnerabilities allow an attacker to execute arbitrary code on a victim's machine remotely, potentially gaining full control over the affected system. Although specific affected versions are not listed, the critical severity and the presence of exploit code indicate a serious flaw that could be leveraged by attackers to compromise user systems. The exploit is written in Python, suggesting that it may be used by attackers to automate the exploitation process, possibly by crafting malicious emails or attachments that, when processed by Outlook, trigger the vulnerability. The lack of patch links implies that either a patch is not yet available or not disclosed publicly at the time of this report. No known exploits in the wild have been reported yet, but the critical nature of the vulnerability and the availability of exploit code increase the risk of imminent exploitation. The absence of detailed technical information such as the exact vulnerability vector, required user interaction, or authentication requirements limits a full technical dissection, but given the nature of Outlook and typical RCE vulnerabilities, it is plausible that the attack could be triggered via specially crafted email content or attachments processed by Outlook's rendering engine or parsing components.
Potential Impact
For European organizations, this RCE vulnerability in Microsoft Outlook poses a significant risk. Outlook is extensively used across enterprises, government agencies, and critical infrastructure sectors in Europe for daily communications. Successful exploitation could lead to unauthorized access to sensitive corporate data, espionage, deployment of ransomware, lateral movement within networks, and disruption of business operations. The potential for data breaches involving personal data protected under GDPR could also result in severe regulatory and financial penalties. Given the critical severity, exploitation could compromise confidentiality, integrity, and availability of affected systems. The threat is particularly concerning for sectors with high reliance on email communications such as finance, healthcare, public administration, and energy. The lack of a patch at the time of reporting increases the urgency for organizations to implement interim mitigations to reduce exposure.
Mitigation Recommendations
European organizations should immediately implement a multi-layered defense strategy. First, enforce strict email filtering and sandboxing to detect and block suspicious attachments or links that could trigger the exploit. Deploy advanced endpoint protection solutions capable of detecting anomalous behaviors indicative of exploitation attempts. Disable automatic preview and rendering of emails in Outlook to prevent automatic execution of malicious content. Apply the principle of least privilege to limit user permissions, reducing the impact of a successful exploit. Network segmentation should be enhanced to contain potential lateral movement. Organizations should monitor network and endpoint logs for indicators of compromise related to Outlook processes. Until an official patch is released, consider using alternative email clients or webmail interfaces that are not vulnerable. Additionally, conduct user awareness training focused on phishing and suspicious email handling. Finally, maintain close communication with Microsoft for timely updates and apply patches immediately upon release.
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, a widely used email client within the Microsoft Office suite. RCE vulnerabilities allow an attacker to execute arbitrary code on a victim's machine remotely, potentially gaining full control over the affected system. Although specific affected versions are not listed, the critical severity and the presence of exploit code indicate a serious flaw that could be leveraged by attackers to compromise user systems. The exploit is written in Python, suggesting that it may be used by attackers to automate the exploitation process, possibly by crafting malicious emails or attachments that, when processed by Outlook, trigger the vulnerability. The lack of patch links implies that either a patch is not yet available or not disclosed publicly at the time of this report. No known exploits in the wild have been reported yet, but the critical nature of the vulnerability and the availability of exploit code increase the risk of imminent exploitation. The absence of detailed technical information such as the exact vulnerability vector, required user interaction, or authentication requirements limits a full technical dissection, but given the nature of Outlook and typical RCE vulnerabilities, it is plausible that the attack could be triggered via specially crafted email content or attachments processed by Outlook's rendering engine or parsing components.
Potential Impact
For European organizations, this RCE vulnerability in Microsoft Outlook poses a significant risk. Outlook is extensively used across enterprises, government agencies, and critical infrastructure sectors in Europe for daily communications. Successful exploitation could lead to unauthorized access to sensitive corporate data, espionage, deployment of ransomware, lateral movement within networks, and disruption of business operations. The potential for data breaches involving personal data protected under GDPR could also result in severe regulatory and financial penalties. Given the critical severity, exploitation could compromise confidentiality, integrity, and availability of affected systems. The threat is particularly concerning for sectors with high reliance on email communications such as finance, healthcare, public administration, and energy. The lack of a patch at the time of reporting increases the urgency for organizations to implement interim mitigations to reduce exposure.
Mitigation Recommendations
European organizations should immediately implement a multi-layered defense strategy. First, enforce strict email filtering and sandboxing to detect and block suspicious attachments or links that could trigger the exploit. Deploy advanced endpoint protection solutions capable of detecting anomalous behaviors indicative of exploitation attempts. Disable automatic preview and rendering of emails in Outlook to prevent automatic execution of malicious content. Apply the principle of least privilege to limit user permissions, reducing the impact of a successful exploit. Network segmentation should be enhanced to contain potential lateral movement. Organizations should monitor network and endpoint logs for indicators of compromise related to Outlook processes. Until an official patch is released, consider using alternative email clients or webmail interfaces that are not vulnerable. Additionally, conduct user awareness training focused on phishing and suspicious email handling. Finally, maintain close communication with Microsoft for timely updates and apply patches immediately upon release.
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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: 7/16/2025, 9:20:36 PM
Last updated: 8/20/2025, 12:53:20 PM
Views: 24
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