What is CVE-2026-55827?

CVE-2026-55827 is a high-severity vulnerability in Freerdp, classified under Incorrect Calculation of Buffer Size. CVSS score: 7.5/10. Published 2026-07-10.

How severe is CVE-2026-55827?

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

Buffer overflow in Freerdp

CVE-2026-55827

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.1, FreeRDP clients launched with the non-default /cache:codec:rfx option pass desktop stride and height to RemoteFX decoding for Cache Bitmap V3 data while allo…

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.

Affected products

Freerdp — versions < 3.27.1

Weakness classification (CWE)

CWE-131 — Incorrect Calculation of Buffer Size
CWE-787 — Out-of-bounds Write

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-55827?: CVE-2026-55827 is a high-severity vulnerability in Freerdp, classified under Incorrect Calculation of Buffer Size. CVSS score: 7.5/10. Published 2026-07-10.
How severe is CVE-2026-55827?: High severity. CVSS v3 base score is 7.5 out of 10.