CVE-2026-55008

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

Score

CVSS 3.1 9.6 Critical

Status

Analyzed - secure@microsoft.com

Published

2026-07-14

Last modified

2026-10-28

Weaknesses

CWE-79

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-2026-55008