CVE-2025-52435: Apache Nimble

High severity, CVSS 7.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Apache Nimble: before 1.9.0 (fixed in 1.9.0)

Published 2026-01-10. Last modified 2026-06-17.