How severe is CVE-2025-51451?

CVE-2025-51451 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-51451 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-51451?

CVE-2025-51451 affects Totolink Ex1200t Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-51451?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-51451 have an EU (EUVD) identifier?

Yes. CVE-2025-51451 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24587.

When was CVE-2025-51451 published?

CVE-2025-51451 was published on 2025-08-13 and last updated on 2026-07-05.

CVE-2025-51451

CVE-2025-51451 is a critical-severity vulnerability in Totolink Ex1200t Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-24587
Weakness: CWE-287
Affected product: Totolink Ex1200t Firmware
Published: 2025-08-13
Last modified: 2026-07-05

Description

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

Frequently asked questions

What is CVE-2025-51451?: In TOTOLINK EX1200T firmware 4.1.2cu.5215, an attacker can bypass login by sending a specific request through formLoginAuth.htm.
How severe is CVE-2025-51451?: CVE-2025-51451 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-51451 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-51451?: CVE-2025-51451 affects Totolink Ex1200t Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-51451?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-51451 have an EU (EUVD) identifier?: Yes. CVE-2025-51451 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24587.
When was CVE-2025-51451 published?: CVE-2025-51451 was published on 2025-08-13 and last updated on 2026-07-05.

References

EU advisories (EUVD)

http://n200re.com

Affected products (1)

cpe:2.3:o:totolink:ex1200t_firmware:4.1.2cu.5215:*:*:*:*:*:*:*

More vulnerabilities in Totolink Ex1200t Firmware

CVE-2025-5600 — Critical (CVSS 9.8): A vulnerability, which was classified as critical, has been found in TOTOLINK EX1200T 4.1.2cu.5232_B20210713. This…
CVE-2025-28039 — Critical (CVSS 9.8): TOTOLINK EX1200T V4.1.2cu.5232_B20210713 was found to contain a pre-auth remote command execution vulnerability in the…
CVE-2025-28038 — Critical (CVSS 9.8): TOTOLINK EX1200T V4.1.2cu.5232_B20210713 was found to contain a pre-auth remote command execution vulnerability in the…
CVE-2023-52032 — Critical (CVSS 9.8): TOTOlink EX1200T V4.1.2cu.5232_B20210713 was discovered to contain a remote command execution (RCE) vulnerability via…
CVE-2021-42890 — Critical (CVSS 9.8): TOTOLINK EX1200T V4.1.2cu.5215 contains a remote command injection vulnerability in function NTPSyncWithHost of the…
CVE-2021-42888 — Critical (CVSS 9.8): TOTOLINK EX1200T V4.1.2cu.5215 contains a remote command injection vulnerability in function setLanguageCfg of the file…

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CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

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