Apache Mynewt NimBLE: Authentication Bypass by Spoofing
CVE-2025-62235 is a high-severity authentication bypass by spoofing vulnerability in Apache Mynewt NimBLE from Apache, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. Affected Apache Mynewt NimBLE versions: 1.8.0 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.38% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Nimble to 1.9.0 or a later version.
- Read the advisory on lists.apache.org for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Apache | Apache Mynewt NimBLE | 1.8.0 and earlier | Not stated |
| Apache | Nimble | before 1.9.0 | 1.9.0 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- AdjacentThe attacker must be on the same local network segment.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by CISA (ADP).
Official description
Authentication Bypass by Spoofing vulnerability in Apache NimBLE. Receiving specially crafted Security Request could lead to removal of original bond and re-bond with impostor. This issue affects Apache NimBLE: through 1.8.0. Users are recommended to upgrade to version 1.9.0, which fixes the issue.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Authentication Bypass by Spoofing
This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.
More Authentication Bypass by Spoofing vulnerabilities (CWE-290)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Patches and release notes
Third-party and government advisories
- openwall.com/lists/oss-security/2026/01/08/4Mailing List, Third Party Advisory
Other vulnerabilities in Apache Mynewt NimBLE
- 7.5 High severity
- 7.5 High severity
Recent Authentication Bypass by Spoofing vulnerabilities
- 8.8 High severity
- 7.4 High severity
- 9.8 Critical severity
- 9.3 Critical severity
- 9.8 Critical severity
- 7.5 High severity
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