Vulnerability · Published Sep 8, 2026 · Assigned by microsoft
CVE-2026-70578Windows Credential Guard Elevation of Privilege Vulnerability
High 7.0
In plain English
A high-severity heap buffer overflow in Windows 10 Version 21H2 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).
Severity (CVSS 3.1)7.0High
Exploit odds (30 days)0.3%top 81.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Heap-based buffer overflow in Windows Credential Guard allows an authorized attacker to elevate privileges locally.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 – before 10.0.19044.7725 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 – before 10.0.19045.7725 |
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0 – before 10.0.22631.7582 |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 – before 10.0.22631.7582 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 – before 10.0.26100.9445 |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 – before 10.0.26200.9445 |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 – before 10.0.28000.2954 |
Weakness: CWE-122 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- Windows Credential Guard Elevation of Privilege Vulnerability vendor-advisory, patch