CVE-2026-62817
HIGHCVSS 8.8/10
Last modified
CVE-2026-62817 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network..
Description
Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.
Metrics
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1809 | >= 10.0.17763.0, < 10.0.17763.9115 |
| Microsoft | Windows 10 Version 21H2 | >= 10.0.19044.0, < 10.0.19044.7663 |
| Microsoft | Windows 10 Version 22H2 | >= 10.0.19045.0, < 10.0.19045.7663 |
| Microsoft | Windows 11 version 23H2 | >= 10.0.22631.0, < 10.0.22631.7517 |
| Microsoft | Windows 11 Version 23H2 | >= 10.0.22631.0, < 10.0.22631.7517 |
| Microsoft | Windows 11 Version 24H2 | >= 10.0.26100.0, < 10.0.26100.9168 |
| Microsoft | Windows 11 Version 25H2 | >= 10.0.26200.0, < 10.0.26200.9168 |
| Microsoft | Windows 11 version 26H1 | >= 10.0.28000.0, < 10.0.28000.2704 |
| Microsoft | Windows Server 2019 | >= 10.0.17763.0, < 10.0.17763.9115 |
| Microsoft | Windows Server 2019 (Server Core installation) | >= 10.0.17763.0, < 10.0.17763.9115 |
| Microsoft | Windows Server 2022 | >= 10.0.20348.0, < 10.0.20348.5499 |
| Microsoft | Windows Server 2025 | >= 10.0.26100.0, < 10.0.26100.33296 |
| Microsoft | Windows Server 2025 (Server Core installation) | >= 10.0.26100.0, < 10.0.26100.33296 |
References
Timeline
- Published
- Last Modified
- Status
- Undergoing Analysis
Frequently Asked Questions
What is CVE-2026-62817?
Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.
How severe is CVE-2026-62817?
CVE-2026-62817 has a CVSS score of 8.8/10 (HIGH severity).
How do I fix CVE-2026-62817?
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-2026-6281A potential vulnerability was reported in some Lenovo Person…8.8
- CVE-2026-62811Heap-based buffer overflow in Windows HTTP.sys allows an aut…7.8
- CVE-2026-62812Improper link resolution before file access ('link following…7.8
- CVE-2026-62814Integer underflow (wrap or wraparound) in Windows DHCP Serve…6.5
- CVE-2026-62815Use after free in Microsoft QUIC allows an unauthorized atta…9.8
- CVE-2026-62816Heap-based buffer overflow in Reliable Multicast Transport D…8.8
- CVE-2026-62818Use after free in Active Directory Certificate Services (AD …8.8
- CVE-2026-62819Remote Code Execution in Windows Routing and Remote Access S…8.1
- CVE-2026-6282A potential improper file path validation vulnerability was …8.6
- CVE-2026-62820Concurrent execution using shared resource with improper syn…8.1
- CVE-2026-62822Integer overflow or wraparound in Windows GDI+ allows an una…8.8
- CVE-2026-62823Heap-based buffer overflow in Windows DHCP Server allows an …8.8
Are you affected by CVE-2026-62817?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST