CVE-2026-42799: Asrmicro ASR1803 Firmware

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Out-of-bounds read vulnerability in ASR Kestrel (nr_fw modules) allows Overflow Buffers. This vulnerability is associated with program files Code/Nr/nr_fw/RA/src/NrPwrCtrl.C. This issue affects Kestrel: before 2026/02/10.

Affected products

• Asrmicro ASR1803 Firmware: before 1.216.002 (fixed in 1.216.002)

Published 2026-04-30. Last modified 2026-06-17.