How severe is CVE-2025-45861?

CVE-2025-45861 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-2025-45861 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-45861?

CVE-2025-45861 affects Totolink A3002r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-45861?

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-2025-45861 have an EU (EUVD) identifier?

Yes. CVE-2025-45861 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-14603.

When was CVE-2025-45861 published?

CVE-2025-45861 was published on 2025-05-13 and last updated on 2026-06-17.

CVE-2025-45861

CVE-2025-45861 is a critical-severity vulnerability in Totolink A3002r 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-14603
Weakness: CWE-120
Affected product: Totolink A3002r Firmware
Published: 2025-05-13
Last modified: 2026-06-17

Description

TOTOLINK A3002R v4.0.0-B20230531.1404 was discovered to contain a buffer overflow via the routername parameter in the formDnsv6 interface.

Frequently asked questions

What is CVE-2025-45861?: TOTOLINK A3002R v4.0.0-B20230531.1404 was discovered to contain a buffer overflow via the routername parameter in the formDnsv6 interface.
How severe is CVE-2025-45861?: CVE-2025-45861 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-2025-45861 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-45861?: CVE-2025-45861 affects Totolink A3002r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-45861?: 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-2025-45861 have an EU (EUVD) identifier?: Yes. CVE-2025-45861 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-14603.
When was CVE-2025-45861 published?: CVE-2025-45861 was published on 2025-05-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:a3002r_firmware:4.0.0-b20230531.1404:*:*:*:*:*:*:*

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