CVE-2026-63586CWE-78command-injection

CVE-2026-63586

Critical · published August 25, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
60.1
In the wild
Unconfirmed
What it is

The web-based management interface uses a modified uhttpd server with CGI shell scripts. The HTTP Basic Authentication username, taken directly from the Authorization header without sanitization, is inserted into a shell command string executed via the system() function. By submitting a specially crafted username containing shell metacharacters, an unauthenticated attacker with network access to the device can escape the command context and execute arbitrary commands with root privileges.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.3 · 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
EPSS
0.00926 · 60.1th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-08-25T13:17Z
References (1)
EPSS history
Timeline
  • 26 AUG 08:20Z
    EPSS moved — → 1%
    epss
  • 25 AUG 08:54Z
    Unauthenticated Remote Code Execution via Shell Injection in Web Management Interface
    cvelistv5