VulnerabilityModified
CVE-2026-22853
FreeRDP is a free implementation of the Remote Desktop Protocol.
MEDIUM 6.8EPSS 0.76%
Does this matter?
Lower severity and a low EPSS score (0.76%). Track it; it rarely justifies an emergency change on its own.
Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, RDPEAR’s NDR array reader does not perform bounds checking on the on‑wire element count and can write past the heap buffer allocated from hints, causing a heap buffer overflow in ndr_read_uint8Array. This vulnerability is fixed in 3.20.1.
- CVSS 4.0
- 6.8 MEDIUMCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.76% probability · 53th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- freerdp/freerdp
- Source
- security-advisories@github.com
References
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1Release Notes
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-47v9-p4gp-w5chExploit, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:19033
- https://access.redhat.com/errata/RHSA-2026:3068
- https://access.redhat.com/errata/RHSA-2026:4121
- https://access.redhat.com/security/cve/CVE-2026-22853
- https://bugzilla.redhat.com/show_bug.cgi?id=2429647
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22853.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.