CVE-2026-2329 PUBLISHED

Grandstream GXP1600 VoIP Phones - Unauthenticated stack buffer overflow

Assigner: rapid7
Reserved: 11.02.2026 Published: 18.02.2026 Updated: 18.02.2026

An unauthenticated stack-based buffer overflow vulnerability exists in the HTTP API endpoint /cgi-bin/api.values.get. A remote attacker can leverage this vulnerability to achieve unauthenticated remote code execution (RCE) with root privileges on a target device. The vulnerability affects all six device models in the series: GXP1610, GXP1615, GXP1620, GXP1625, GXP1628, and GXP1630.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 9.3

Product Status

Vendor Grandstream
Product GXP1610
Versions Default: unaffected
  • affected from 0 to 1.0.7.80 (incl.)
Vendor Grandstream
Product GXP1615
Versions Default: unaffected
  • affected from 0 to 1.0.7.80 (incl.)
Vendor Grandstream
Product GXP1620
Versions Default: unaffected
  • affected from 0 to 1.0.7.80 (incl.)
Vendor Grandstream
Product GXP1625
Versions Default: unaffected
  • affected from 0 to 1.0.7.80 (incl.)
Vendor Grandstream
Product GXP1628
Versions Default: unaffected
  • affected from 0 to 1.0.7.80 (incl.)
Vendor Grandstream
Product GXP1630
Versions Default: unaffected
  • affected from 0 to 1.0.7.80 (incl.)

Credits

  • Stephen Fewer, Senior Principal Security Researcher at Rapid7 finder

References

Problem Types

  • CWE-121 Stack-based Buffer Overflow CWE