How severe is CVE-2025-43986?

CVE-2025-43986 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-2025-43986 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-43986?

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-2025-43986 have an EU (EUVD) identifier?

Yes. CVE-2025-43986 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24639.

When was CVE-2025-43986 published?

CVE-2025-43986 was published on 2025-08-13 and last updated on 2026-06-17.

CVE-2025-43986

CVE-2025-43986 is a critical-severity vulnerability 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-200.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-24639
Weakness: CWE-200
Published: 2025-08-13
Last modified: 2026-06-17

Description

An issue was discovered on KuWFi GC111 GC111-GL-LM321_V3.0_20191211 devices. The TELNET service is enabled by default and exposed over the WAN interface without authentication.

Frequently asked questions

What is CVE-2025-43986?: An issue was discovered on KuWFi GC111 GC111-GL-LM321_V3.0_20191211 devices. The TELNET service is enabled by default and exposed over the WAN interface without authentication.
How severe is CVE-2025-43986?: CVE-2025-43986 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-2025-43986 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-43986?: 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-2025-43986 have an EU (EUVD) identifier?: Yes. CVE-2025-43986 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24639.
When was CVE-2025-43986 published?: CVE-2025-43986 was published on 2025-08-13 and last updated on 2026-06-17.

References

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