CVE-2026-66801
CRITICALCVSS 9.8/10
Last modified
CVE-2026-66801 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Heap-based buffer overflow in Xbox allows an unauthorized attacker to execute code over a network..
Description
Heap-based buffer overflow in Xbox allows an unauthorized attacker to execute code over a network.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft GDK | >= 1.0.0.0, < 2610 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-66801?
Heap-based buffer overflow in Xbox allows an unauthorized attacker to execute code over a network.
How severe is CVE-2026-66801?
CVE-2026-66801 has a CVSS score of 9.8/10 (CRITICAL severity).
How do I fix CVE-2026-66801?
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-2026-66794A flaw was found in the `cluster-proxy-addon` component of M…9.3
- CVE-2026-66795A flaw was found in the managedcluster-import-controller. Th…9.9
- CVE-2026-66797Improper access control in CloudStack's annotation functiona…5.4
- CVE-2026-66798Use after free in Microsoft Edge (Chromium-based) allows an …4.3
- CVE-2026-66799Heap-based buffer overflow in Windows Key Guard allows an au…7.8
- CVE-2026-66800Server-side request forgery (ssrf) in Azure Data Factory all…7.5
- CVE-2026-66802Concurrent execution using shared resource with improper syn…8.1
- CVE-2026-66803Improper access control in Azure Cosmos DB allows an unautho…10
- CVE-2026-66804Improper access control in Windows Cross Device Service allo…7.8
- CVE-2026-66805Deserialization of untrusted data in Microsoft Office ShareP…8.8
- CVE-2026-66806Off-by-one error in Microsoft Office Word allows an unauthor…5.5
- CVE-2026-66807Stack-based buffer overflow in Microsoft Office allows an un…7.8
Are you affected by CVE-2026-66801?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST