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CVE-2026-5853 - Vulnerability Analysis

CriticalCVSS: 9.8

Last Updated: April 9, 2026

Totolink A7100RU - Command Injection

Published: April 9, 2026Updated: April 9, 2026Remote Exploitable

Overview

Totolink A7100RU 7.4cu.2313_b20191024 contains a command injection caused by manipulation of the "addrPrefixLen" argument in setIpv6LanCfg function of /cgi-bin/cstecgi.cgi CGI Handler, letting remote attackers execute OS commands, exploit requires no special privileges.

Severity & Score

Severity: Critical

CVSS Score: 9.8

Impact

Remote attackers can execute arbitrary OS commands, potentially leading to full system compromise.

Mitigation

Update to the latest version.

References

https://www.totolink.net/
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_159/README.md
https://vuldb.com/submit/791274
https://vuldb.com/vuln/356379
https://vuldb.com/vuln/356379/cti

Related Resources

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Details

CVE ID: CVE-2026-5853
Severity: Critical
CVSS Score: 9.8
Type: command_injection
Status: new

CWE

CWE-77

CVSS Metrics

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