Summary
Impact: Information Disclosure. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
Security updates
1.8.77 — https://github.com/microsoft/Agents-for-net/releases/tag/v1.8.77
Vulnerabilities 1
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Medium 6.3
Microsoft 365 Agents SDK Information Disclosure Vulnerability
Server-side request forgery (ssrf) in Microsoft 365 Agents SDK allows an authorized attacker to disclose information over a network.
Revision history
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#1
Information published.
References
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CVE-2026-109485 Microsoft 365 Agents SDK Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109485
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss