---
id: 7755
title: "CVE-2025-21299 and CVE-2025-29809: Unguarding Microsoft Credential Guard"
source_domain: netspi.com
source_url: "https://www.netspi.com/blog/technical-blog/red-teaming/cve-2025-21299-cve-2025-29809-unguarding-microsoft-credential-guard/"
published_at: "2025-04-15T00:00:00Z"
tags: ["kerberos", "windows", "red-team", "tgt", "credential-guard", "cve-2025-21299", "cve-2025-29809"]
phying_url: "https://phying.com/item/7755"
lang: en
---

# CVE-2025-21299 and CVE-2025-29809: Unguarding Microsoft Credential Guard

## Summary

CVE-2025-21299 and CVE-2025-29809 are Kerberos feature bypasses: insufficient validation of the krbtgt service name in TGTs lets attackers bypass Credential Guard and extract protected primary TGTs.

## Intelligence Metadata

- **Sources:** netspi.com
- **Published:** 2025-04-15T00:00:00Z
- **Original:** https://www.netspi.com/blog/technical-blog/red-teaming/cve-2025-21299-cve-2025-29809-unguarding-microsoft-credential-guard/
- **Phying News:** https://phying.com/item/7755