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CVSS 8.8 · HIGH

CVE-2026-7750

A vulnerability was detected in Totolink N300RH 3.2.4-B20220812. This vulnerability affects the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument mac_address results in buffer overflow. The attack may be launched remotely. The exploit is now public and may be used.

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Analysis

This is a vendor-specific firmware vulnerability for a single model of Totolink consumer routers. It does not affect the Linux kernel, common development tools, or server-side infrastructure used by the developer community. The impact is isolated to users of this specific hardware model.

Severity

Score: 8.8(HIGH)
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AV: NETWORK
AC: LOW
PR: LOW
UI: NONE
S: UNCHANGED
C: HIGH
I: HIGH
A: HIGH
Weakness (CWE): CWE-119CWE-120

EPSS

Probability of exploitation (next 30 days): 0.0008 (0.1%)
Percentile: 22.6%
EPSS: 2026-05-06

Technical description

A vulnerability was detected in Totolink N300RH 3.2.4-B20220812. This vulnerability affects the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument mac_address results in buffer overflow. The attack may be launched remotely. The exploit is now public and may be used.

Published: 5/4/2026, 10:16:01 AM
Last modified: 5/4/2026, 3:17:58 PM

References

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