CVE-2026-69356

CriticalCVSS 9.3/10Last modified Sep 30, 2026

Description

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.

Metrics

CVSS 3.1 9.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Weakness enumeration

CWE-79

Affected software

VendorProductVersions
MicrosoftMicrosoft Exchange Server 2016 Cumulative Update 23>= 15.01.0.0, < 15.01.2507.073
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 14>= 15.02.0.0, < 15.02.1544.046
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 15>= 15.02.0.0, < 15.02.1748.051
MicrosoftMicrosoft Exchange Server Subscription Edition RTM>= 15.02.0.0, < 15.02.2562.049

References

Timeline

Published
Sep 8, 2026
Last modified
Sep 30, 2026
NVD status
Analyzed

Related CVEs from 2026

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CVE-2026-69356: Critical severity, CVSS 9.3 | Vulnix