CVE-2026-5853

CRITICAL

Totolink A7100RU CGI cstecgi.cgi setIpv6LanCfg os command injection

Title source: cna

Description

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.

References (5)

Core 5

Core References

Vdb Entry, Technical Description vdb-entry technical-description

VDB-356379 | Totolink A7100RU CGI cstecgi.cgi setIpv6LanCfg os command injection

https://vuldb.com/vuln/356379

Signature, Permissions Required signature permissions-required

VDB-356379 | CTI Indicators (IOB, IOC, TTP, IOA)

https://vuldb.com/vuln/356379/cti

Third Party Advisory third-party-advisory

Submit #791274 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection

https://vuldb.com/submit/791274

Exploit exploit

https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_159/README.md

View Exploit ZIP pw:eip

Product product

https://www.totolink.net/

Scores

CVSS v3 9.8

EPSS 0.1428

EPSS Percentile 96.1%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-77 CWE-78

Status published

Products (1)

Totolink/A7100RU 7.4cu.2313_b20191024

Published Apr 09, 2026

Tracked Since Apr 09, 2026