What is CVE-2025-28256?

CVE-2025-28256 is a critical-severity vulnerability in Totolink A3100r, classified under OS Command Injection. CVSS score: 9.8/10. Published 2025-03-28.

How severe is CVE-2025-28256?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Totolink A3100r

CVE-2025-28256

An issue in TOTOLINK A3100R V4.1.2cu.5247_B20211129 allows a remote attacker to execute arbitrary code via the setWebWlanIdx of the file /lib/cste_modules/wireless.so.

Vulnerability class: Command Injection (OS Command Injection)

Published 2025-03-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: +0.000

Affected products

Totolink A3100r
Totolink A3100r Firmware — versions 4.1.2cu.5247_b20211129

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

github.com/ZackSecurity/VulnerReport/blob/cve/totolink/A3100R/1.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-28256?: CVE-2025-28256 is a critical-severity vulnerability in Totolink A3100r, classified under OS Command Injection. CVSS score: 9.8/10. Published 2025-03-28.
How severe is CVE-2025-28256?: Critical severity. CVSS v3 base score is 9.8 out of 10.