PT-2025-15500 · Microsoft · Windows Kerberos+1

Virotwith · Published 2025-04-08 · Updated 2025-09-29 · CVE-2025-26647

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Windows Kerberos (affected versions not specified)

Description: The issue is related to improper input validation in Windows Kerberos, allowing an unauthorized attacker to elevate privileges over a network. Microsoft has released patches in April to address this issue.

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

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2025-04135

CVE-2025-26647

Affected Products

Windows

Windows Kerberos

References · 23

• https://nvd.nist.gov/vuln/detail/CVE-2025-26647 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-26647 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26647 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/719760 · Security Note
• https://osv.dev/vulnerability/CVE-2025-26647 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-26647 · Security Note
• https://bdu.fstec.ru/vul/2025-04135 · Security Note
• https://twitter.com/cheinyeanlim/status/1962188334153023914 · Twitter Post
• https://twitter.com/endi24/status/1943632725576929543 · Twitter Post
• https://twitter.com/Jfreeg_/status/1910016824667763150 · Twitter Post
• https://twitter.com/BruceSaaaa/status/1920146526925406557 · Twitter Post
• https://reddit.com/r/sysadmin/comments/1kjzbsg/april_2025_cve202526647_patch_is_causing_havoc · Reddit Post
• https://twitter.com/syedaquib77/status/1920170980561039467 · Twitter Post
• https://reddit.com/r/sysadmin/comments/1m75x5m/cve202526647_rhel_ad_joins_with_realmdsssd · Reddit Post
• https://t.me/cvenotify/118947 · Telegram Post