CVE-2026-5853

CRITICAL 9.8

Totolink A7100RU CGI cstecgi.cgi setIpv6LanCfg os command injection

CVSS Score

9.8

EPSS Score

0.9%

EPSS Percentile

76th

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.

CWE	CWE-78 CWE-77
Vendor	totolink
Product	a7100ru
Published	Apr 9, 2026
Last Updated	Apr 9, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Totolink / A7100RU

7.4cu.2313_b20191024

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 LtzHuster2 (VulDB User)