How severe is CVE-2025-51390?

CVE-2025-51390 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-2025-51390 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-51390?

CVE-2025-51390 affects Totolink N600r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-51390?

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-2025-51390 have an EU (EUVD) identifier?

Yes. CVE-2025-51390 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23538.

When was CVE-2025-51390 published?

CVE-2025-51390 was published on 2025-08-04 and last updated on 2026-07-05.

CVE-2025-51390

CVE-2025-51390 is a critical-severity vulnerability in Totolink N600r 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-23538
Weakness: CWE-78
Affected product: Totolink N600r Firmware
Published: 2025-08-04
Last modified: 2026-07-05

Description

TOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a command injection vulnerability via the pin parameter in the setWiFiWpsConfig function.

Frequently asked questions

What is CVE-2025-51390?: TOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a command injection vulnerability via the pin parameter in the setWiFiWpsConfig function.
How severe is CVE-2025-51390?: CVE-2025-51390 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-2025-51390 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-51390?: CVE-2025-51390 affects Totolink N600r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-51390?: 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-2025-51390 have an EU (EUVD) identifier?: Yes. CVE-2025-51390 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23538.
When was CVE-2025-51390 published?: CVE-2025-51390 was published on 2025-08-04 and last updated on 2026-07-05.

References

EU advisories (EUVD)

http://totolink.com

Affected products (1)

cpe:2.3:o:totolink:n600r_firmware:4.3.0cu.7647_b20210106:*:*:*:*:*:*:*

More vulnerabilities in Totolink N600r Firmware

CVE-2025-46060 — Critical (CVSS 9.8): Buffer Overflow vulnerability in TOTOLINK N600R v4.3.0cu.7866_B2022506 allows a remote attacker to execute arbitrary…
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CVE-2023-43141 — Critical (CVSS 9.8): TOTOLINK A3700R V9.1.2u.6134_B20201202 and N600R V5.3c.5137 are vulnerable to Incorrect Access Control.
CVE-2022-29399 — Critical (CVSS 9.8): TOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a stack overflow via the url parameter in the function…
CVE-2022-29398 — Critical (CVSS 9.8): TOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a stack overflow via the File parameter in the…
CVE-2022-29397 — Critical (CVSS 9.8): TOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a stack overflow via the comment parameter in the…

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