What is CVE-2025-28039?

CVE-2025-28039 is a critical-severity vulnerability in Totolink Ex1200t, classified under OS Command Injection. CVSS score: 9.8/10. Published 2025-04-22.

How severe is CVE-2025-28039?

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

Is CVE-2025-28039 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Totolink Ex1200t

CVE-2025-28039

TOTOLINK EX1200T V4.1.2cu.5232_B20210713 was found to contain a pre-auth remote command execution vulnerability in the setUpgradeFW function through the FileName parameter.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.009 (55.8th percentile) — read the EPSS interpretation.

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.

Affected products

Totolink Ex1200t
Totolink Ex1200t_firmware — versions 4.1.2cu.5232_b20210713
N/a — versions n/a

Weakness classification (CWE)

CWE-78 — OS Command Injection

Public proof-of-concept exploits

Lunax0/CVE_

References

cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-28039?: CVE-2025-28039 is a critical-severity vulnerability in Totolink Ex1200t, classified under OS Command Injection. CVSS score: 9.8/10. Published 2025-04-22.
How severe is CVE-2025-28039?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2025-28039 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.