What is CVE-2026-77897?

CVE-2026-77897 is a high-severity vulnerability in Microsoft Power Automate Agent For Virtual Desktops, classified under Relative Path Traversal. CVSS score: 7.0/10. Published 2026-09-08.

How severe is CVE-2026-77897?

High severity. CVSS v3 base score is 7.0 out of 10.

Path Traversal in Microsoft Power Automate Agent For Virtual Desktops

CVE-2026-77897

Relative path traversal in Power Automate allows an authorized attacker to elevate privileges locally.

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

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (19.7th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000

Affected products

Weakness classification (CWE)

CWE-23 — Relative Path Traversal

References

Microsoft Power Automate Desktop Elevation of Privilege Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-77897?: CVE-2026-77897 is a high-severity vulnerability in Microsoft Power Automate Agent For Virtual Desktops, classified under Relative Path Traversal. CVSS score: 7.0/10. Published 2026-09-08.
How severe is CVE-2026-77897?: High severity. CVSS v3 base score is 7.0 out of 10.