Cleartext transmission of sensitive information in Apache NimBLE - CVE-2025-52435
Published: January 8, 2026
Vulnerability identifier: #VU121103
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-52435
CWE-ID: CWE-319
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Apache Foundation
Affected software:
Apache NimBLE
Apache NimBLE
Detailed vulnerability description
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to improper handling of Pause Encryption procedure on Link Layer, which results in a previously encrypted connection being left in un-encrypted state. A remote attacker with ability to intercept network traffic can gain access to sensitive data.
How to mitigate CVE-2025-52435
Install updates from vendor's website.