CVE-2026-5853 CRITICAL

CVE-2026-5853: Totolink A7100RU CGI cstecgi.cgi setIpv6LanCfg os command injection

Vendor Totolink
Product A7100RU
Weakness CWE-78
Published April 9, 2026
Last update April 9, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

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/E:P

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 9, 2026 CVE published
April 9, 2026 Record updated