CVE-2025-52435

J2EE Misconfiguration: Data Transmission Without Encryption vulnerability in Apache NimBLE. Improper handling of Pause Encryption procedure on Link Layer results in a previously encrypted connection being left in un-encrypted state allowing an eavesdropper to observe the remainder of the exchange. This issue affects Apache NimBLE: through <= 1.8.0. Users are recommended to upgrade to version 1.9.0, which fixes the issue.

Score

CVSS 3.1 7.5 High

Status

Analyzed - security@apache.org

Published

2026-01-10

Last modified

2026-01-12

Weaknesses

CWE-5

Affected products

• Nimble (Apache)
• Apache Mynewt Nimble (Apache Software Foundation)

References

• https://github.com/apache/mynewt-nimble/commit/164f1c23c18a290908df76ed83fe848bfe4a4903
• https://github.com/apache/mynewt-nimble/commit/ec3d75e909fa6dcadf1836fefc4432794a673d18
• https://lists.apache.org/thread/ow8dzpsqfh9llfclh5fzh6z237brzc0s
• http://www.openwall.com/lists/oss-security/2026/01/08/1