CVE-2025-66270

Unknown Unknown - Not Provided

BaseFortify

Publication date: 2025-12-05

Last updated on: 2025-12-08

Assigner: MITRE

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 Scores

EPSS Scores

Probability:
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Meta Information

Published

2025-12-05

Last Modified

2025-12-08

Generated

2026-07-06

AI Q&A

2025-12-10

EPSS Evaluated

2026-07-05

NVD

CVE-2025-66270

EUVD

EUVD-2025-201386

Affected Vendors & Products

Vendor	Product	Version / Range
kde	kde_connect	25.04
gsconnect	gsconnect	68
valent	valent	1.0.0.alpha.49
kde	kde_connect	0.5.4
kde	kde_connect	1.34.4
valent	valent	1.0.0.alpha.47
kde	kde_connect	0.5.2
gsconnect	gsconnect	59
kde	kde_connect	25.12
kde	kde_connect	1.33.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-290	This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

Attack-Flow Graph

Compliance Impact

The provided resources do not explicitly discuss the impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA. However, since the vulnerability allows an attacker to impersonate a paired device and bypass authentication, it could potentially lead to unauthorized access to personal or sensitive data, which may affect compliance with data protection regulations. No direct statements about compliance impact are given. [3]

Executive Summary

This vulnerability in KDE Connect protocol versions before 2025-11-28 involves the failure to correlate device IDs across two packets. This means that the protocol does not properly link or verify device identities between separate communications, potentially leading to issues in device authentication or session management.

Impact Analysis

The vulnerability can impact users by allowing potential confusion or misassociation between devices communicating via KDE Connect. This could lead to unauthorized access or information leakage between devices, as the protocol does not reliably verify that packets come from the same device, potentially compromising confidentiality and integrity.

Mitigation Strategies

Immediate mitigation steps include stopping the use of KDE Connect on untrusted networks such as airports or conferences, or unpairing all devices until the vulnerability is patched. The ultimate solution is to update KDE Connect and related software (GSConnect, Valent, Android, iOS versions) to the fixed versions that include the patches addressing this vulnerability. [3]

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