Vulnerability in M365 Copilot (CVE-2026-41100)
Summary
Vulnerability in M365 Copilot (CVE-2026-41100). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A weakness called CVE-2026-41100 was discovered in M365 Copilot.
Severity is Medium (CVSS 4.4/10). Exploitation requires specific conditions but can cause real harm if successful.
What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "M365 Copilot CVE-2026-41100".
CVE-2026-41100 (M365 Copilot). Severity: Medium / CVSSv3 4.4. Category: CWE-284.
Response plan:
- Check the vendor advisory for affected versions and the patched release.
- If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS).
- If no patch yet, mitigate via WAF rule, disabling the affected feature, etc.
- Monitor logs / SIEM for known IOC and PoC signatures of this CVE.
PoCs and fix commits: see the 'References' section, MITRE, and NVD.
A weakness (CVE-2026-41100) in M365 Copilot. A serious software flaw has been identified.
Target versions of M365 Copilot (see vendor advisory). If running in production, identify exposure immediately.
Severity: Medium (CVSS 4.4/10). Exploitation requires specific conditions but can cause real harm if successful.
Update to the patched release as listed in the vendor advisory. (Typical mitigation pattern for CWE-284)
If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.
Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.
References
- patch secure@microsoft.com
- web nvd.nist.gov
- web github.com