CVE-2019-10655

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 15.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-03-30 · updated 2026-06-17
Weakness: CWE-78

Description

Grandstream GAC2500 1.0.3.35, GXP2200 1.0.3.27, GVC3202 1.0.3.51, GXV3275 before 1.0.3.219 Beta, and GXV3240 before 1.0.3.219 Beta devices allow unauthenticated remote code execution via shell metacharacters in a /manager?action=getlogcat priority field, in conjunction with a buffer overflow (via the phonecookie cookie) to overwrite a data structure and consequently bypass authentication. This can be exploited remotely or via CSRF because the cookie can be placed in an Accept HTTP header in an XMLHttpRequest call to lighttpd.

Affected products

Grandstream Gac2500 Firmware: through 1.0.3.35
Grandstream Gvc3202 Firmware: before 1.0.3.51 — fixed in 1.0.3.51
Grandstream Gxp2200 Firmware: through 1.0.3.27
Grandstream Gxv3240 Firmware: before 1.0.3.219 — fixed in 1.0.3.219
Grandstream Gxv3275 Firmware: before 1.0.3.219 — fixed in 1.0.3.219

How to fix

Upgrade to a fixed version: Grandstream Gvc3202 Firmware 1.0.3.51; Grandstream Gxv3240 Firmware 1.0.3.219; Grandstream Gxv3275 Firmware 1.0.3.219. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2019-10655 or the next vulnerability affects your stack