Out-of-bounds Read in Freerdp
CVE-2026-121397
FreeRDP before 3.32.2 contains a heap buffer over-read vulnerability in save_png_to_buffer() that allows malicious RDP servers to leak client memory by sending 16 bpp DIB clipboard data. Attackers can offer a CF_DIB BI_BITFIELDS image that, when converted to PNG for a local application, embeds client heap bytes into the clipboard image.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-x7w3-32ch-x2jq (vendor-advisory, Vendor Advisory)
- www.vulncheck.com/advisories/freerdp-before-3.32.2-heap-over-read-via-winpr-sav… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-121397?
- CVE-2026-121397 is a medium-severity vulnerability in Freerdp, classified under Out-of-bounds Read. CVSS score: 4.3/10. Published 2026-11-03.
- How severe is CVE-2026-121397?
- Medium severity. CVSS v3 base score is 4.3 out of 10.