Grandstream GRP261x VoIP phone running firmware version 1.0.3.6 (Base) allow Authentication Bypass in its administrative web interface.
https://github.com/fireeye/Vulnerability-Disclosures/blob/master/FEYE-2021-0002/FEYE-2021-0002.md
https://cwe.mitre.org/data/definitions/306.html
Source: Mitre, NVD
Published: 2021-03-29
Updated: 2026-06-17
Base Score: 10
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
Severity: Critical
Base Score: 9.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.0036