How severe is CVE-2025-22900?

CVE-2025-22900 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-2025-22900 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-22900?

CVE-2025-22900 affects Totolink N600r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-22900?

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-2025-22900 have an EU (EUVD) identifier?

Yes. CVE-2025-22900 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-11093.

When was CVE-2025-22900 published?

CVE-2025-22900 was published on 2025-04-15 and last updated on 2026-06-17.

CVE-2025-22900

CVE-2025-22900 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-121.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-11093
Weakness: CWE-121
Affected product: Totolink N600r Firmware
Published: 2025-04-15
Last modified: 2026-06-17

Description

Totolink N600R v4.3.0cu.7647_B20210106 was discovered to contain a stack overflow via the macCloneMac parameter in the setWanConfig function.

Frequently asked questions

What is CVE-2025-22900?: Totolink N600R v4.3.0cu.7647_B20210106 was discovered to contain a stack overflow via the macCloneMac parameter in the setWanConfig function.
How severe is CVE-2025-22900?: CVE-2025-22900 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-2025-22900 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-22900?: CVE-2025-22900 affects Totolink N600r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-22900?: 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-2025-22900 have an EU (EUVD) identifier?: Yes. CVE-2025-22900 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-11093.
When was CVE-2025-22900 published?: CVE-2025-22900 was published on 2025-04-15 and last updated on 2026-06-17.

References

https://github.com/xyqer1/TOTOLINK-N600R-setWanConfig-StackOverflow

Affected products (1)

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

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