CVE tracker / CVE-2026-62871
CVE-2026-62871
CVE-2026-62871 is the .NET Elevation of Privilege Vulnerability. Microsoft rates it Important, CVSS 7.8. It is not in CISA's Known Exploited Vulnerabilities catalog. Published August 11, 2026.
Risk summary
HighRemote Code Execution
7.8
CVSS v3 base
0.5%
EPSS: chance of exploitation in 30 days
High
Severity
Important
Microsoft's rating
Less Likely
Microsoft: exploitation
No
In CISA KEV
Microsoft describes it: “Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.”
How to fix it
Microsoft lists 4 affected products and the update that fixes each:
What Microsoft changed
- August 11, 2026: Information published.
- September 21, 2026: Updated an acknowledgement. This is an informational change only.
- August 13, 2026: Removed Linux and macOS products from the Affected Software table. This is an informational change only.
Details
- Weakness
- CWE-787: Out-of-bounds Write
- Publicly disclosed (Microsoft)
- No
- Exploited (Microsoft)
- No
- Known exploited (CISA KEV)
- Not listed
- Published
- August 11, 2026
- Last revised
- September 21, 2026
Get told when this changes
Senserva Watch emails Microsoft security and patch alerts when something moves: a new exploitation report, a revised fix, a known issue. Free, one email address.
References
From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.