CVE-2021-26731: Lannerinc Iac-AST2500A Firmware

Critical severity, CVSS 9.8. EPSS: 2.4% chance of exploitation in the next 30 days.

Command injection and multiple stack-based buffer overflows vulnerabilities in the modifyUserb_func function of spx_restservice allow an authenticated attacker to execute arbitrary code with the same privileges as the server user (root). This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.

Affected products

• Lannerinc Iac-AST2500A Firmware: version 1.10.0 only

Published 2022-10-24. Last modified 2026-06-17.