CVE-2026-69380: Microsoft Exchange Server Elevation of Privilege Vulnerability

highCVSS 8.1CVE-2026-69380

Missing authorization in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 8.1
Published: 2026-09-08
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69380

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-693800.71% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 51% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-69380	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Microsoft Exchange Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

high[NEU] [hoch] Microsoft Exchange Server: Mehrere Schwachstellencert-bund · 2026-09-09
unknownNCSC-2026-0349 [1.00] [M/H] Kwetsbaarheden verholpen in Microsoft Exchange serverncsc-nl · 2026-09-08
criticalCVE-2026-69641: Missing authorization in Microsoft Exchange Server allows an authorized attacker to elevate pr…nvd · 2026-09-08
mediumCVE-2026-69382: Use of a broken or risky cryptographic algorithm in Microsoft Exchange Server allows an unauth…nvd · 2026-09-08
highCVE-2026-69380: Missing authorization in Microsoft Exchange Server allows an authorized attacker to elevate pr…nvd · 2026-09-08
highCVE-2026-69378: Uncontrolled recursion in Microsoft Exchange Server allows an unauthorized attacker to deny se…nvd · 2026-09-08