CVE-2026-5853CWE-77CWE-78

Totolink A7100RU CGI cstecgi.cgi setIpv6LanCfg os command injection

Critical · published April 9, 2026

CVSS v4.0
9.3
EPSS
3%
Percentile
88.3
In the wild
Unconfirmed
What it is

A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this vulnerability is the function setIpv6LanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument addrPrefixLen leads to os command injection. The attack may be performed from remote. The exploit has been disclosed publicly and may be used.

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
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/E:P
EPSS
0.03253 · 88.3th percentile
Weaknesses
CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection'); CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-04-09T06:30Z
EPSS history
Timeline
  • 25 SEP 03:26Z
    EPSS moved 14% → 3%
    epss
  • 09 APR 06:30Z
    Totolink A7100RU CGI cstecgi.cgi setIpv6LanCfg os command injection
    cvelistv5