CVE-2026-87695

7.8High

Published 13 Oct 2026 · NVD status: Undergoing Analysis · AI triage by gemini-3.8-flash

7.8High

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None
Impact: Full C/I/A compromise
Weakness: CWE-829

Impact

Authenticated local attackers can gain elevated privileges on the Microsoft Exchange Server host. They need existing local access or low-privilege credentials on the target system to exploit it.

Root cause

The application imports or executes functionality from an untrusted control sphere.

Affected systems

Versions not listed — check the vendor advisory.

CVSS v3.1 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Fix & remediation

Install the official Microsoft security update for your Exchange Server cumulative update release from MSRC; no interim workaround is provided.

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

Inclusion of functionality from untrusted control sphere in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87695

Source: nvd.nist.gov/vuln/detail/CVE-2026-87695