CVE-2026-55005

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

Score

CVSS 3.1 8.8 High

Status

Analyzed - secure@microsoft.com

Published

2026-07-14

Last modified

2026-10-28

Weaknesses

CWE-122

Affected products

• Exchange Server (Microsoft)
• Exchange Server 2016 (Microsoft)
• Exchange Server 2019 (Microsoft)
• Exchange Server Se (Microsoft)
• Exchange Server Subscription Edition (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55005