PT-2026-58251 · Microsoft · Exchange Server

CVE-2026-55008 · Published 2026-07-14 · Updated 2026-07-14

Positive Technologies (AI Summary)

CVSS v3.1

9.6

Critical

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Microsoft Exchange Server (affected versions not specified)

Description Improper neutralization of input during web page generation leads to cross-site scripting, which allows an unauthorized attacker to perform spoofing over a network. Cross-site scripting is a technique where malicious scripts are injected into trusted websites.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-55008

Affected Products

Exchange Server

References · 3

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55008 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-55008 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-55008 · Security Note