FreeRDP 3.0.0 before 3.32.2 Proxy Memory Exhaustion via DVC Reassembly
Affects FreeRDP 3.0.0 up to 3.32.2 when a proxy configuration or loaded module intercepts an attacker-reachable DVC. Fixed in 3.32.2.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 3.32.2
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. The DVC must be selected for proxy interception Proxy configuration or a loaded module must select the attacker-reachable DVC for interception The attacker must be able to establish an RDP session through the proxy
- Exploitation0/40No signal
- Exposure8/25Specific setups only, reachable over the network
- Reach?/20Reach: unknown (data gap). No tracked technology or package matched
- Severity7.1/10CVSS 7.1
- No patch0/5No signal
What would change the score
- Would score about 65 if added to CISA KEV
- Would score about 60 if CISA's SSVC rates exploitation active
- Would score about 22 if CISA's SSVC rates it automatable
CVE-2026-121412 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.1 (high) and affects FreeRDP; fixed in 3.32.2.
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- Published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 15/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Fix
- Fixed in 3.32.2
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
FreeRDP from 3.0.0 before 3.32.2 contains an uncontrolled resource consumption vulnerability in the proxy that lets connected clients retain heap memory via intercepted DVC message reassembly. Attackers can declare a large DATA_FIRST length and keep sending fragments without completing the message, growing proxy memory proportional to traffic and degrading service.
What to do
Check whether your setup matches what the bug needs.
The DVC must be selected for proxy interception Proxy configuration or a loaded module must select the attacker-reachable DVC for interception The attacker must be able to establish an RDP session through the proxyUpgrade to a fixed version: 3.32.2.
Timeline
- CVE published
- First seen by cve.now
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- FreeRDP FreeRDP
From 3.0.0 · fixed in 3.32.2
Evidence 2
- Advisory
- Link
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-121412
Is CVE-2026-121412 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
For a DVC selected for proxy interception, FreeRDP keeps a message incomplete while a connected client holds it open, so the shared proxy retains heap memory in proportion to traffic. This degrades the proxy's availability.Source: github.com, vulncheck.com
Which versions are affected by CVE-2026-121412?
FreeRDP: from 3.0.0 before 3.32.2.Source: cve.now feed data
Am I affected, and how do I check?
Versions from 3.0.0 before 3.32.2 are in scope. The setup also needs a proxy configuration or loaded module that selects the attacker-reachable DVC for interception, and an RDP session established through the proxy. Check the FreeRDP version and the proxy's DVC interception settings.Source: github.com, vulncheck.com
How do I fix CVE-2026-121412?
Upgrade to FreeRDP 3.32.2 or later, which contains the fix. The facts list no workaround.Source: github.com, vulncheck.com