How severe is CVE-2025-67188?

CVE-2025-67188 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-2025-67188 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-67188?

CVE-2025-67188 affects Totolink A950rg Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-67188?

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-2025-67188 have an EU (EUVD) identifier?

Yes. CVE-2025-67188 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206713.

When was CVE-2025-67188 published?

CVE-2025-67188 was published on 2026-02-03 and last updated on 2026-06-17.

CVE-2025-67188

CVE-2025-67188 is a critical-severity vulnerability in Totolink A950rg 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% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-206713
Weakness: CWE-120
Affected product: Totolink A950rg Firmware
Published: 2026-02-03
Last modified: 2026-06-17

Description

A buffer overflow vulnerability exists in TOTOLINK A950RG V4.1.2cu.5204_B20210112. The issue resides in the setRadvdCfg interface of the /lib/cste_modules/ipv6.so module. The function fails to properly validate the length of the user-controlled radvdinterfacename parameter, allowing remote attackers to trigger a stack buffer overflow.

Frequently asked questions

What is CVE-2025-67188?: A buffer overflow vulnerability exists in TOTOLINK A950RG V4.1.2cu.5204_B20210112. The issue resides in the setRadvdCfg interface of the /lib/cste_modules/ipv6.so module. The function fails to properly validate the length of the user-controlled radvdinterfacename parameter, allowing remote attackers to trigger a stack buffer overflow.
How severe is CVE-2025-67188?: CVE-2025-67188 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-2025-67188 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-67188?: CVE-2025-67188 affects Totolink A950rg Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-67188?: 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-2025-67188 have an EU (EUVD) identifier?: Yes. CVE-2025-67188 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206713.
When was CVE-2025-67188 published?: CVE-2025-67188 was published on 2026-02-03 and last updated on 2026-06-17.

References

https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A950RG/5024-ipv6-setRadvdCfg-radvdinterfacename-buffer.md

Affected products (1)

cpe:2.3:o:totolink:a950rg_firmware:4.1.2cu.5204_b20210112:*:*:*:*:*:*:*

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