CVE-2026-32743 | PX4 PX4-Autopilot up to 1.17.0-rc2 sscanf stack-based overflow (EUVD-2026-13003)

VDB-351643 · CVE-2026-32743 · EUVD-2026-13003 PX4 PX4-AUTOPILOT UP TO 1.17.0-RC2 SSCANF STACK-BASED OVERFLOW HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.3 $0-$5k 3.37+ Summaryinfo A vulnerability was found in PX4 PX4-Autopilot up to 1.17.0-rc2. It has been classified as critical. The affected element is the function sscanf. This manipulation causes stack-based overflow. This vulnerability appears as CVE-2026-32743. The attacker needs to be present on the local network. There is no available exploit. To fix this issue, it is recommended to deploy a patch. Detailsinfo A vulnerability has been found in PX4 PX4-Autopilot up to 1.17.0-rc2 and classified as critical. Affected by this vulnerability is the function sscanf. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect availability. The summary by CVE is: PX4 is an open-source autopilot stack for drones and unmanned vehicles. Versions 1.17.0-rc2 and below are vulnerable to Stack-based Buffer Overflow through the MavlinkLogHandler, and are triggered via MAVLink log request. The LogEntry.filepath buffer is 60 bytes, but the sscanf function parses paths from the log list file with no width specifier, allowing a path longer than 60 characters to overflow the buffer. An attacker with MAVLink link access can trigger this by first creating deeply nested directories via MAVLink FTP, then requesting the log list. The flight controller MAVLink task crashes, losing telemetry and command capability and causing DoS. This issue has been fixed in this commit: https://github.com/PX4/PX4-Autopilot/commit/616b25a280e229c24d5cf12a03dbf248df89c474. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-32743 since 03/13/2026. The exploitation appears to be easy. Access to the local network is required for this attack. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. Applying the patch 616b25a280e229c24d5cf12a03dbf248df89c474 is able to eliminate this problem. The bugfix is ready for download at github.com. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-13003). Productinfo Vendor PX4 Name PX4-Autopilot Version 1.17.0-rc1 1.17.0-rc2 License open-source Website Product: https://github.com/PX4/PX4-Autopilot/ CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.4 VulDB Meta Temp Score: 5.3 VulDB Base Score: 4.3 VulDB Temp Score: 4.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 6.5 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Stack-based overflow CWE: CWE-121 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Partially Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Patch Status: 🔍 0-Day Time: 🔒 Patch: 616b25a280e229c24d5cf12a03dbf248df89c474 Timelineinfo 03/13/2026 CVE reserved 03/19/2026 +6 days Advisory disclosed 03/19/2026 +0 days VulDB entry created 03/19/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: 616b25a280e229c24d5cf12a03dbf248df89c474 Status: Confirmed CVE: CVE-2026-32743 (🔒) GCVE (CVE): GCVE-0-2026-32743 GCVE (VulDB): GCVE-100-351643 EUVD: 🔒 Entryinfo Created: 03/19/2026 01:40 Updated: 03/19/2026 02:18 Changes: 03/19/2026 01:40 (67), 03/19/2026 02:18 (2) Complete: 🔍 Cache ID: 99:55F:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸