FreeRDP clients from 3.0.0 before 3.32.2 built with verbose WinPR assertions contain a reachable assertion in
Affects freerdpSource GCVE Database
Not known to be exploited · CVSS 5.3 Medium · fixed in 3.32.2+dfsg-0ubuntu0.24.04.1 : update freerdp when convenient.
Data as of 9 Nov 2026, 23:24 UTC
Thin evidence
One scorer or none| CNA (VulnCheck) | CVSS 4.0 | 5.3 |
|---|---|---|
| CNA (VulnCheck) | CVSS 3.1 | 4.3 |
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 24% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 3.32.2+dfsg-0ubuntu0.24.04.1, 3.32.2+dfsg-0ubuntu0.26.10.1, 3.32.2+dfsg-0ubuntu0.26.04.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 3 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.
What to do
Upgrade the Ubuntu freerdp3 to 3.32.2+dfsg-0ubuntu0.24.04.1 (package) or 3.32.2+dfsg-0ubuntu0.26.10.1 (package) or 3.32.2+dfsg-0ubuntu0.26.04.1 (package).
Patches and advisories
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10freerdp3pkg:deb/ubuntu/freerdp3?arch=source&distro=stonkingOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSfreerdp3pkg:deb/ubuntu/freerdp3?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSfreerdp3pkg:deb/ubuntu/freerdp3?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu Pro 24.04 LTSfreerdp2pkg:deb/ubuntu/freerdp2?arch=source&distro=esm-apps/nobleOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTSfreerdp2pkg:deb/ubuntu/freerdp2?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Ubuntu Pro 20.04 LTSfreerdp2pkg:deb/ubuntu/freerdp2?arch=source&distro=esm-infra/focalOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available in FreeRDP version 3.32.2 and later. Users should update their FreeRDP clients to version 3.32.2+dfsg-0ubuntu0.24.04.1, 3.32.2+dfsg-0ubuntu0.26.10.1, or 3.32.2+dfsg-0ubuntu0.26.04.1 depending on their Ubuntu release. Standard system updates will apply the necessary patches. No additional mitigation steps are required beyond applying the official update.
Description
FreeRDP clients from version 3.0.0 up to but not including 3.32.2 built with verbose WinPR assertions contain a reachable assertion failure in the rts_read_auth_verifier function. This can be triggered by an attacker controlling an RD Gateway sending a crafted RPC-over-HTTP RTS PDU with inconsistent authentication padding, causing the client process to abort. This results in a denial of service condition.
References
- ubuntu.com/security/CVE-2026-121396 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-121396 (opens in a new tab)
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6p3w-fv52-cf24 (opens in a new tab)
- vulncheck.com/advisories/freerdp-3.0.0-before-3.32.2-denial-of-service-via-rts-padding-assertion (opens in a new tab)
- ubuntu.com/security/notices/USN-9007-1 (opens in a new tab)