What’s Vulnerable › Vulnerabilities

CVE-2026-1579: PX4 Autopilot Missing authentication for critical function

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-31 · updated 2026-07-29
• Weakness: CWE-306

Description

The MAVLink communication protocol does not require cryptographic authentication by default. When MAVLink 2.0 message signing is not enabled, any message -- including SERIAL_CONTROL, which provides interactive shell access -- can be sent by an unauthenticated party with access to the MAVLink interface. PX4 provides MAVLink 2.0 message signing as the cryptographic authentication mechanism for all MAVLink communication. When signing is enabled, unsigned messages are rejected at the protocol level.

Affected products

• PX4 Autopilot: 1.16.0

References

• https://docs.px4.io/main/en/mavlink/message_signing
• https://docs.px4.io/main/en/mavlink/security_hardening
• https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-090-02.json
• https://www.cisa.gov/news-events/ics-advisories/icsa-26-090-02

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