CVE-2026-26128

HIGH

Windows SMB Server - Privilege Escalation

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 3 public exploits for CVE-2026-26128. PoCs published by adminlove520, XZ1r0, jarnovandenbrink.

AI-analyzed exploit summary This repository contains a functional Python exploit for CVE-2026-26128, which leverages Unicode normalization in Windows Active Directory to bypass Kerberos reflection mitigations. The exploit uses DNS manipulation and relay techniques to target ADCS web enrollment or MSSQL services.

Description

Improper authentication in Windows SMB Server allows an authorized attacker to elevate privileges locally.

Exploits (3)

github WORKING POC 4 stars
by adminlove520 · pythonpoc
https://github.com/adminlove520/CVE-Poc_All_in_One/tree/main/2026/CVE-2026-26128

This repository contains a functional Python exploit for CVE-2026-26128, which leverages Unicode normalization in Windows Active Directory to bypass Kerberos reflection mitigations. The exploit uses DNS manipulation and relay techniques to target ADCS web enrollment or MSSQL services.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: Windows Active Directory (Kerberos/ADCS/MSSQL)
Auth required
Prerequisites: Valid domain credentials · DNS write access · Target service (ADCS/MSSQL)
devstral-2 · analyzed May 26, 2026 Full analysis →
github WORKING POC
by XZ1r0 · pythonpoc
https://github.com/XZ1r0/cve-2026-poc-collection/tree/main/other/CVE-2026-26128

This repository contains a functional exploit PoC for CVE-2026-26128, which appears to be a Kerberos-related vulnerability. The code includes modules for Kerberos authentication, DNS manipulation, and SMB relay attacks, suggesting it exploits a flaw in Active Directory or similar environments.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Complex
Reliability
Reliable
Target: Active Directory / Kerberos
No auth needed
Prerequisites: Network access to target domain controller · Valid Kerberos ticket or credentials
devstral-2 · analyzed May 21, 2026 Full analysis →

References (3)

Core 3

Scores

CVSS v3 7.8
EPSS 0.0045
EPSS Percentile 35.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-287
Status published
Products (37)
Microsoft/Windows 10 Version 1607 10.0.14393.0 - 10.0.14393.8957
Microsoft/Windows 10 Version 1809 10.0.17763.0 - 10.0.17763.8511
Microsoft/Windows 10 Version 21H2 10.0.19044.0 - 10.0.19044.7058
Microsoft/Windows 10 Version 22H2 10.0.19045.0 - 10.0.19045.7058
Microsoft/Windows 11 version 22H3 10.0.22631.0 - 10.0.22631.6783
Microsoft/Windows 11 Version 23H2 10.0.22631.0 - 10.0.22631.6783
Microsoft/Windows 11 Version 24H2 10.0.26100.0 - 10.0.26100.8037
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26200.8037
Microsoft/Windows 11 version 26H1 10.0.28000.0 - 10.0.28000.1719
Microsoft/Windows 11 Version 26H1 10.0.28000.0 - 10.0.28000.1719
... and 27 more
Published Mar 10, 2026
Tracked Since Mar 11, 2026