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CVSS 9.8 · CRITICAL

CVE-2026-7124

A vulnerability was determined in Totolink A8000RU 7.1cu.643_b20200521. Affected by this vulnerability is the function setIpv6LanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument addrPrefixLen can lead to os command injection. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized.

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Analysis

The vulnerability involves a remote command injection in a specific model of Totolink home routers. While the severity is critical, this hardware is not part of the standard software development or infrastructure stack used by the community. It is a vendor-specific firmware issue with no impact on general web, mobile, or backend development.

Severity

Score: 9.8(CRITICAL)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV: NETWORK
AC: LOW
PR: NONE
UI: NONE
S: UNCHANGED
C: HIGH
I: HIGH
A: HIGH
Weakness (CWE): CWE-77CWE-78

EPSS

Probability of exploitation (next 30 days): 0.0125 (1.3%)
Percentile: 79.5%
EPSS: 2026-05-06

Technical description

A vulnerability was determined in Totolink A8000RU 7.1cu.643_b20200521. Affected by this vulnerability is the function setIpv6LanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument addrPrefixLen can lead to os command injection. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized.

Published: 4/27/2026, 1:16:04 PM
Last modified: 4/27/2026, 6:36:42 PM

References

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