CVE-2026-32743: PX4-Autopilot · Stack-based Buffer Overflow
Affects PX4-AutopilotSource CVE Database V5
Not known to be exploited · CVSS 6.5 Medium.
Data as of 31 Oct 2026, 08:20 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 32% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 18 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
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), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| PX4PX4-Autopilot | Affected
| Fixed in– |
GitHubpx4/PX4-Autopilotpkg:github/px4/PX4-AutopilotOther 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
Organizations should immediately upgrade PX4-Autopilot to versions later than 1.17.0-rc2 that include the patch fixing this buffer overflow. If upgrading is not immediately possible, restrict MAVLink link access to trusted and authenticated users only, ideally isolating MAVLink communication channels from untrusted networks. Implement network segmentation and firewall rules to prevent unauthorized MAVLink FTP and log requests. Monitor MAVLink traffic for unusual directory creation or log list requests that could indicate exploitation attempts. Consider applying runtime protections such as stack canaries or address space layout randomization (ASLR) if supported by the flight controller hardware and software environment. Conduct thorough testing of autopilot firmware updates in controlled environments before deployment to ensure stability and security. Finally, maintain awareness of PX4 security advisories and community updates for any emerging threats or patches.
Description
CVE-2026-32743 is a stack-based buffer overflow vulnerability in PX4-Autopilot versions 1.17.0-rc2 and earlier. The flaw exists in the MavlinkLogHandler component, where a fixed 60-byte buffer is overflowed due to unbounded sscanf parsing of file paths. An attacker with MAVLink link access can exploit this by creating deeply nested directories via MAVLink FTP and then requesting the log list, causing the flight controller's MAVLink task to crash. This results in denial of service by loss of telemetry and command capabilities. The vulnerability does not impact confidentiality or integrity but severely affects availability. No authentication or user interaction is required to trigger the issue. The vulnerability has a CVSS score of 6.5 (medium severity) and has been fixed in a recent commit.