9.8

CVE-2025-51451: totolink ex1200t_firmware Improper Authentication

CVSS: 9.8v3.1CriticalModified
Published 13-08-2025Last modified 05-07-2026
Open JSON

Vulnerability summary

CVE-2025-51451 is a critical (CVSS 9.8) Improper Authentication vulnerability in totolink ex1200t_firmware. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 31.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.38%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 13-08-2025
    PublishedVulnerability first disclosed.
  2. 05-07-2026
    Last modifiedVulnerability information updated.

Description

In TOTOLINK EX1200T firmware 4.1.2cu.5215, an attacker can bypass login by sending a specific request through formLoginAuth.htm.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

31%

Versus all other CVEs

30-day change

0.00 pp

From 0.38% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.38%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Totolink1 product

1 vendor · 1 product

References

2 links