Vulnerability · Published Jan 10, 2026 · Assigned by apache
CVE-2025-52435Apache Mynewt NimBLE: Invalid error handling in pause encryption procedure in NimBLE controller
High 7.5
In plain English
A high-severity security flaw in Apache Mynewt NimBLE from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Official description
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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Mynewt NimBLE | 0 – through 1.8.0 |
Weakness: CWE-5 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/apache/mynewt-nimble/commit/164f1c23c18a290908df76ed83fe848bfe4a4903 patch
- https://github.com/apache/mynewt-nimble/commit/ec3d75e909fa6dcadf1836fefc4432794a673d18 patch
- https://lists.apache.org/thread/ow8dzpsqfh9llfclh5fzh6z237brzc0s vendor-advisory
- http://www.openwall.com/lists/oss-security/2026/01/08/1