CVE-2025-52435

Name: CVE-2025-52435
Creator: NVD / NIST
Published: 2026-01-10T10:15:50.32+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.21%

Last modified Jun 17, 2026

CVE-2025-52435 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.21%

10.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-5

Affected Software

Vendor	Product	Versions
Apache	Nimble	< 1.9.0

References

https://github.com/apache/mynewt-nimble/commit/164f1c23c18a290908df76ed83fe848bfe4a4903Patch
https://github.com/apache/mynewt-nimble/commit/ec3d75e909fa6dcadf1836fefc4432794a673d18Patch
https://lists.apache.org/thread/ow8dzpsqfh9llfclh5fzh6z237brzc0sMailing List, Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/01/08/1Mailing List, Third Party Advisory

Timeline

Published: Jan 10, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-52435?

How severe is CVE-2025-52435?

CVE-2025-52435 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.

How do I fix CVE-2025-52435?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-52435?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST