What is CVE-2025-66270?

CVE-2025-66270 is a medium-severity vulnerability in Kde Connect Protocol, classified under Authentication Bypass by Spoofing. CVSS score: 4.7/10. Published 2025-12-05.

How severe is CVE-2025-66270?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Vulnerability in Kde Connect Protocol

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.

EPSS: 0.002 (7.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Kde Connect Protocol — versions 8

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

cve@mitre.org
cve@mitre.org
cve@mitre.org
cve@mitre.org
cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2025-66270?: CVE-2025-66270 is a medium-severity vulnerability in Kde Connect Protocol, classified under Authentication Bypass by Spoofing. CVSS score: 4.7/10. Published 2025-12-05.
How severe is CVE-2025-66270?: Medium severity. CVSS v3 base score is 4.7 out of 10.