CVE-2026-91945

Medium

Description

FreeRDP versions before 3.31.0 contain an out-of-bounds read vulnerability in smartcard response decoders that fail to validate ATR length fields against fixed inline arrays. Authenticated RDP clients can send oversized ATR lengths in PAKID_CORE_DEVICE_IOCOMPLETION responses to trigger reads past stack or heap objects, causing process termination.

SeverityMedium

CVSS6.5

Exploit probability—

ProductFreerdp

PublishedSep 15, 2026

First seenSep 15, 2026

Weakness typeCWE-125Out-of-bounds read

How to fix

Update

freerdp freerdp3.31.0 or later

Patches

github.com/FreeRDP/FreeRDP/commit/9626564421df72c84f891afdbc0b20bf702f369f

Vendor advisories

github.com/FreeRDP/FreeRDP/security/advisories/GHSA-q65v-4w7q-hx3r

Affected products

Product	Affected versions	Fixed in
freerdp freerdp	3.28.0 ≤ v < 3.31.0	3.31.0

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.