CVE-2026-25832: CWE-669 Incorrect Resource Transfer Between Spheres in TrustedFirmware Mbed TLS
In Mbed TLS 3.6.x before 3.6.7 and 4.1.x before 4.1.2, the TLS 1.3 client accepts HelloRetryRequest selecting an unadvertised group.
AI Analysis
Technical Summary
In Mbed TLS versions >=3.5.0 <3.6.7 and >=4.0.0 <4.1.2, the TLS 1.3 client improperly accepts a HelloRetryRequest message that selects a cryptographic group not originally advertised by the client. This behavior is a violation of the TLS 1.3 protocol specification and is categorized as CWE-669 (Incorrect Resource Transfer Between Spheres). The flaw could lead to limited impact on the integrity of the TLS handshake process.
Potential Impact
The vulnerability does not affect confidentiality or availability but has a low impact on integrity, as indicated by the CVSS vector (C:N/I:L/A:N). There are no known exploits in the wild. The issue could potentially allow an attacker to influence the TLS handshake by selecting an unadvertised group, but the overall risk is low.
Mitigation Recommendations
A fix is available in Mbed TLS versions 3.6.7 and 4.1.2 and later. Users should upgrade to these versions or later to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-25832: CWE-669 Incorrect Resource Transfer Between Spheres in TrustedFirmware Mbed TLS
Description
In Mbed TLS 3.6.x before 3.6.7 and 4.1.x before 4.1.2, the TLS 1.3 client accepts HelloRetryRequest selecting an unadvertised group.
CVSS v3.1
Score 3.7low
Affected software
TrustedFirmware
Mbed TLS
pkg:github/armmbed/mbedtlsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
In Mbed TLS versions >=3.5.0 <3.6.7 and >=4.0.0 <4.1.2, the TLS 1.3 client improperly accepts a HelloRetryRequest message that selects a cryptographic group not originally advertised by the client. This behavior is a violation of the TLS 1.3 protocol specification and is categorized as CWE-669 (Incorrect Resource Transfer Between Spheres). The flaw could lead to limited impact on the integrity of the TLS handshake process.
Potential Impact
The vulnerability does not affect confidentiality or availability but has a low impact on integrity, as indicated by the CVSS vector (C:N/I:L/A:N). There are no known exploits in the wild. The issue could potentially allow an attacker to influence the TLS handshake by selecting an unadvertised group, but the overall risk is low.
Mitigation Recommendations
A fix is available in Mbed TLS versions 3.6.7 and 4.1.2 and later. Users should upgrade to these versions or later to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-02-06T00:00:00.000Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa79bfd55bf5e2cf5ac9d65
Added to database: 09/14/2026, 07:02:21 UTC
Last enriched: 09/14/2026, 07:33:31 UTC
Last updated: 09/15/2026, 04:59:12 UTC
Views: 14
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