Medium 6.8Published Jan 14, 2026

CVE-2026-22853FreeRDP has a heap-buffer-overflow in ndr_read_uint8Array

Updated under an hour ago (Oct 27, 2026, 8:10 AM ET)

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It affects FreeRDP and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for FreeRDP

Exploited in the last 30 days

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: 6.8 MEDIUM (v4.0, CNA)CVSS: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
Weakness (CWE): CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Aug 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

FreeRDP FreeRDP freerdp:freerdp (from the name)	before 3.20.1	CNA record
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	from 2:3.10.3-12.el10_2.2 not affected; from 2:3.10.3-5.el10_1.2 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus	from 2:3.10.3-3.el10_0.2 not affected	CISA ADP
freerdp freerdp freerdp:freerdp	before 3.20.1	NVD

References

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-47v9-p4gp-w5ch	x-refsource-confirm, exploit, vendor-advisory
https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1	x-refsource-misc, release-notes
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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.