Critical (9.8) in grandstream gxp2135 firmware. EPSS 27% chance of exploitation in the next 30 days.
An os command injection vulnerability exists in the CWMP SelfDefinedTimeZone functionality of Grandstream GXP2135 1.0.9.129, 1.0.11.74 and 1.0.11.79. A specially crafted network packet can lead to arbitrary command execution. An attacker can send a sequence of malicious packets to trigger this vulnerability.
Severity
CVSS 3.1
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
27% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)