What is CVE-2026-22854?

CVE-2026-22854 is a critical-severity vulnerability in Freerdp, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-01-14.

How severe is CVE-2026-22854?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Freerdp

CVE-2026-22854

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a heap-buffer-overflow occurs in drive read when a server-controlled read length is used to read file data into an IRP output stream buffer without a hard up…

Vulnerability class: Buffer Overflow

EPSS: 0.005 (36.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Freerdp — versions < 3.20.1

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-22854?: CVE-2026-22854 is a critical-severity vulnerability in Freerdp, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-01-14.
How severe is CVE-2026-22854?: Critical severity. CVSS v3 base score is 9.8 out of 10.