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Vulnerability record · CVE-2025-52435 · published 10 January 2026

CVE-2025-52435: Apache nimble vulnerability

Apache · Nimble

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.

7.5 CVSS 3.1 High EPSS 0.23% · top 87.3% CWE-5 · CWE-5
7.5CVSS 3.1 base score
0.23%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/apache/mynewt-nimble/commit/164f1c23c18a290908df76ed83fe848bfe4a4903 Patch
https://github.com/apache/mynewt-nimble/commit/ec3d75e909fa6dcadf1836fefc4432794a673d18 Patch
https://lists.apache.org/thread/ow8dzpsqfh9llfclh5fzh6z237brzc0s Mailing ListVendor Advisory
http://www.openwall.com/lists/oss-security/2026/01/08/1 Mailing ListThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2026-45813Apache nimble out-of-bounds write vulnerabilityOut-of-bounds Write, Integer Underflow (Wrap or Wraparound) vulnerability in Apache NimBLE BASS service. Improper validation when parsing BASS servic…EPSS 0.53%8.1CVE-2025-62235Apache nimble authentication bypass by spoofing vulnerabilityAuthentication Bypass by Spoofing vulnerability in Apache NimBLE. Receiving specially crafted Security Request could lead to removal of original bond…EPSS 0.38%7.5CVE-2026-45815Apache nimble vulnerabilityReachable Assertion vulnerability in Apache NimBLE. A specially crafted ATT Read Multiple Variable Response (BLE_ATT_OP_READ_MULT_VAR_RSP) may trigge…EPSS 1.0%7.5CVE-2026-45816Apache nimble null pointer dereference vulnerabilityNULL Pointer Dereference vulnerability in Apache NimBLE in LE Long Term Key Request event. This requires disabled asserts (otherwise assert would tri…EPSS 1.0%7.5CVE-2026-45811Apache nimble classic buffer overflow vulnerabilityBuffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in Apache NimBLE. The HCI socket transport did not check whether…EPSS 0.48%7.5CVE-2025-53477Apache nimble null pointer dereference vulnerabilityNULL Pointer Dereference vulnerability in Apache Nimble. Missing validation of HCI connection complete or HCI command TX buffer could lead to NULL po…EPSS 0.80%7.5CVE-2024-51569Apache nimble out-of-bounds read vulnerabilityOut-of-bounds Read vulnerability in Apache NimBLE. Missing proper validation of HCI Number Of Completed Packets could lead to out-of-bound access whe…EPSS 1.2%7.5CVE-2024-24746Apache nimble vulnerabilityLoop with Unreachable Exit Condition ('Infinite Loop') vulnerability in Apache NimBLE.  Specially crafted GATT operation can cause infinite loop in G…EPSS 1.4%

Source: NIST National Vulnerability Database (record CVE-2025-52435), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.