CVE-2026-70279

CriticalCVSS 9.3/10Last modified Oct 13, 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

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
MicrosoftMicrosoft Exchange Server 2016 Cumulative Update 23>= 15.01.0.0, < 15.01.2507.077
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 14>= 15.02.0.0, < 15.02.1544.050
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 15>= 15.02.0.0, < 15.02.1748.055
MicrosoftMicrosoft Exchange Server Subscription Edition RTM>= 15.02.0.0, < 15.02.2562.056

References

Timeline

Published
Oct 13, 2026
Last modified
Oct 13, 2026
NVD status
Undergoing Analysis

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CVE-2026-70279: Critical severity, CVSS 9.3 | Vulnix