What is CVE-2026-69805?

CVE-2026-69805 is a high-severity vulnerability in Microsoft Microsoft.diagnostics.runtime, classified under External Control of File Name or Path. CVSS score: 7.5/10. Published 2026-09-08.

How severe is CVE-2026-69805?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in Microsoft Microsoft.diagnostics.runtime

CVE-2026-69805

External control of file name or path in .NET allows an unauthorized attacker to elevate privileges over a network.

Published 2026-09-08 · last modified 2026-09-29.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (41.7th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.005 · change: -0.001

Affected products

Weakness classification (CWE)

References

.NET Elevation of Privilege Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-69805?: CVE-2026-69805 is a high-severity vulnerability in Microsoft Microsoft.diagnostics.runtime, classified under External Control of File Name or Path. CVSS score: 7.5/10. Published 2026-09-08.
How severe is CVE-2026-69805?: High severity. CVSS v3 base score is 7.5 out of 10.