Is CVE-2025-66270 in the CISA KEV catalog?

No. CVE-2025-66270 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-66270?

CVE-2025-66270 has a CVSS v3 base score of 4.7 (MEDIUM).

What is the EPSS score for CVE-2025-66270?

CVE-2025-66270 has an EPSS score of 0.18% (8th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-66270?

Upgrade gnome-shell-extension-gsconnect on debian 13 to 62-1+deb13u1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2025-66270

MEDIUM

4.7

CVSS v3

NVD

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.

CWE-290

How to fix

Remediation Available

gnome-shell-extension-gsconnectDebian

Fixed in:62-1+deb13u1CVE-2025-66270

Fixed in:71-1CVE-2025-66270

kdeconnectUbuntu

Fixed in:25.08.1-0ubuntu2.1USN-7905-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Exploit Intelligence

0.18%probability of exploitation in 30 days

8thpercentile

Low risk: more likely to be exploited than 8% of all known CVEs.

References

Other references6

Related Vulnerabilities

Other CWE-290 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-4358	Critical	9.8	97%	KEV	-
CVE-2022-24112	Critical	9.8	96%	KEV	Fix
CVE-2022-23131	Critical	9.1	96%	KEV	-
CVE-2021-29441	High	8.6	74%	-	Fix
CVE-2021-31195	Medium	6.5	74%	-	Fix
CVE-2020-7388	Critical	10.0	70%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-12-08.