CVE-2026-69821
HIGHCVSS 7.8/10
Last modified
CVE-2026-69821 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Improper encoding or escaping of output in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges locally..
Description
Improper encoding or escaping of output in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges locally.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1607 | >= 10.0.14393.0, < 10.0.14393.9512 |
| Microsoft | Windows 10 Version 1809 | >= 10.0.17763.0, < 10.0.17763.9245 |
| Microsoft | Windows Server 2012 | >= 6.2.9200.0, < 6.2.9200.26349 |
| Microsoft | Windows Server 2012 (Server Core installation) | >= 6.2.9200.0, < 6.2.9200.26349 |
| Microsoft | Windows Server 2012 R2 | >= 6.3.9600.0, < 6.3.9600.23397 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | >= 6.3.9600.0, < 6.3.9600.23397 |
| Microsoft | Windows Server 2016 | >= 10.0.14393.0, < 10.0.14393.9512 |
| Microsoft | Windows Server 2016 (Server Core installation) | >= 10.0.14393.0, < 10.0.14393.9512 |
| Microsoft | Windows Server 2019 | >= 10.0.17763.0, < 10.0.17763.9245 |
| Microsoft | Windows Server 2019 (Server Core installation) | >= 10.0.17763.0, < 10.0.17763.9245 |
| Microsoft | Windows Server 2022 | >= 10.0.20348.0, < 10.0.20348.5622 |
| Microsoft | Windows Server 2025 | >= 10.0.26100.0, < 10.0.26100.33438 |
| Microsoft | Windows Server 2025 (Server Core installation) | >= 10.0.26100.0, < 10.0.26100.33438 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-69821?
Improper encoding or escaping of output in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-69821?
CVE-2026-69821 has a CVSS score of 7.8/10 (HIGH severity).
How do I fix CVE-2026-69821?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-69816Use after free in Windows Accounts Control allows an authori…7
- CVE-2026-69817Use after free in Windows Bluetooth Port Driver allows an au…7
- CVE-2026-69818Use after free in Windows Win32K allows an authorized attack…7
- CVE-2026-69819Out-of-bounds write in RPC Runtime allows an unauthorized at…9.8
- CVE-2026-6982A vulnerability was determined in star7th ShowDoc up to 2.10…6.3
- CVE-2026-69820Heap-based buffer overflow in Windows Hello allows an author…6.7
- CVE-2026-69822Numeric truncation error in Windows Kerberos allows an autho…7.8
- CVE-2026-69824Integer underflow (wrap or wraparound) in Microsoft Standard…9.8
- CVE-2026-69826Heap-based buffer overflow in Windows Biometric Service allo…8
- CVE-2026-69827Concurrent execution using shared resource with improper syn…8.1
- CVE-2026-69829Heap-based buffer overflow in Windows Shell allows an unauth…9.8
- CVE-2026-6983A vulnerability was identified in pagekit up to 1.0.18. Affe…4.7
Are you affected by CVE-2026-69821?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST