CVE-2026-55005

HIGH 8.8CVE-2026-55005 · Published 14/07/2026 · updated 14/10/2026

In short

CVE-2026-55005 is a HIGH (CVSS 8.8) vulnerability affecting exchange server (microsoft), exchange server subscription edition (microsoft).
Chance of exploitation in the next 30 days (EPSS): 1.0%, higher than 63.2% of all vulnerabilities.
Fix: update to 15.02.2562.045 or later.

Package	Affected versions	Patched versions
exchange server microsoft	`= 2016= 2019`	No fix yet
exchange server subscription edition microsoft	`< 15.02.2562.045`	`15.02.2562.045`

Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network.

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Package

Affected versions

Patched versions

= 2016= 2019

No fix yet

< 15.02.2562.045

15.02.2562.045

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