How severe is CVE-2025-66270?

CVE-2025-66270 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-66270 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-66270?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-66270 have an EU (EUVD) identifier?

Yes. CVE-2025-66270 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201386.

When was CVE-2025-66270 published?

CVE-2025-66270 was published on 2025-12-05 and last updated on 2026-06-17.

CVE-2025-66270

CVE-2025-66270 is a medium-severity vulnerability with a CVSS 3.x base score of 4.7. 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-290.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-201386
Weakness: CWE-290
Published: 2025-12-05
Last modified: 2026-06-17

Description

The KDE Connect protocol 8 before 2025-11-28 does not correlate device IDs across two packets. This affects KDE Connect before 25.12 on desktop, KDE Connect before 0.5.4 on iOS, KDE Connect before 1.34.4 on Android, GSConnect before 68, and Valent before 1.0.0.alpha.49.

Frequently asked questions

What is CVE-2025-66270?: The KDE Connect protocol 8 before 2025-11-28 does not correlate device IDs across two packets. This affects KDE Connect before 25.12 on desktop, KDE Connect before 0.5.4 on iOS, KDE Connect before 1.34.4 on Android, GSConnect before 68, and Valent before 1.0.0.alpha.49.
How severe is CVE-2025-66270?: CVE-2025-66270 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-66270 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-66270?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66270 have an EU (EUVD) identifier?: Yes. CVE-2025-66270 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201386.
When was CVE-2025-66270 published?: CVE-2025-66270 was published on 2025-12-05 and last updated on 2026-06-17.

References

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