CVE-2026-25832
Low
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.
SeverityLow
CVSS3.7
Exploit probability—
ProductMbed TLS
PublishedSep 14, 2026
First seenSep 14, 2026
Weakness typeCWE-669CWE-669
How to fix
Update
- TrustedFirmware Mbed TLS3.6.7, 4.1.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| TrustedFirmware Mbed TLS | 3.5.0 ≤ v < 3.6.7, 4.0.0 ≤ v < 4.1.2 | 3.6.7, 4.1.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.