PT-2026-2758 · Microsoft · Sharepoint Server

Martin Wrona + 1 · Published 2026-01-13 · Updated 2026-01-13 · CVE-2026-20959

Positive Technologies · (AI Summary)

CVSS v2.0

5.5

Medium

AV:N/AC:L/Au:S/C:P/I:P/A:N

Name of the Vulnerable Software and Affected Versions Microsoft Office SharePoint (affected versions not specified)

Description The software contains a flaw due to improper neutralization of input during web page generation, which can lead to cross-site scripting. An authorized attacker can exploit this to perform spoofing over a network.

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

BDU:2026-00804

CVE-2026-20959

Affected Products

Sharepoint Server

References · 8

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20959 · Security Note
• https://bdu.fstec.ru/vul/2026-00804 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20959 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-20959 · Security Note
• https://osv.dev/vulnerability/CVE-2026-20959 · Vendor Advisory
• https://cybersecurity-help.cz/vulnerabilities/121326 · Note
• https://twitter.com/CVEnew/status/2011181531516322210 · Twitter Post
• https://dbugs.ptsecurity.com/vulnerability/PT-2026-2758 · Note