Description
Relative path traversal in Windows Kerberos allows an authorized attacker to elevate privileges over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Windows Server 2025 | 10.0.26100.0 – < 10.0.26100.4946 | 10.0.26100.4946 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – < 10.0.26100.4946 | 10.0.26100.4946 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 3 repositories
-
b5null/Invoke-BadSuccessor.ps1 ★ 46 · Nov 19, 2025
PowerShell Script to automatically abuse the BadSuccessor vulnerability (CVE-2025-53779)
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razureink/cve-2025-53779-kerberos_bypass_reproduction ★ 0 · Jul 24, 2026
Reproduction of cve-2025-53779-kerberos_bypass_reproduction
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Musa-xvi/Active-Directory-BadSuccessor ★ 0 · Jun 5, 2026
A TryHackme room covering the CVE-2025-53779 exploitation using windows
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 3
- WID-SEC-2025-1790 Microsoft Windows und Windows Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 20, 2025
- NCSC-2025-0251 Kwetsbaarheden verholpen in Microsoft Windows NCSC-NL (Netherlands) · Aug 13, 2025
- MSRC-CVE-2025-53779 Windows Kerberos Elevation of Privilege Vulnerability Microsoft Security Response Center · Aug 12, 2025
References
- Windows Kerberos Elevation of Privilege Vulnerability vendor-advisory patch