Medium severity · published Dec 5, 2025
CVE-2025-66270
The KDE Connect protocol 8 before 2025-11-28 does not correlate device IDs across two packets
4.7
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack vector
Adjacent
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KC
KDE Connect protocol · KDE
8 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-66270
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-66270
github.com
https://github.com/GSConnect/gnome-shell-extension-gsconnect/commit/a38246deec0af50ae218cdc51db32cdd7eb145e3
github.com
https://github.com/andyholmes/valent/commit/85f773124a67ed1add79e7465bb088ec667cccce
invent.kde.org
https://invent.kde.org/network/kdeconnect-android/-/commit/675d2d24a1eb95d15d9e5bde2b7e2271d5ada6a9
invent.kde.org
https://invent.kde.org/network/kdeconnect-ios/-/commit/6c003c22d04270cabc4b262d399c753d55cf9080
invent.kde.org
https://invent.kde.org/network/kdeconnect-kde/-/commit/4e53bcdd5d4c28bd9fefd114b807ce35d7b3373e
kde.org
https://kde.org/info/security/advisory-20251128-1.txt