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TI-2026-20887 Aliases CVE-2026-25832GHSA-583p-89c4-mqq9

In Mbed TLS 3.6.x before 3.6.7 and 4.1.x before 4.1.2, the TLS 1.3 client accepts…

Priority LOW 17CWE-669Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00282 20th percentileScored 2026-11-07
Fix Fixed Mbed TLS (TrustedFirmware): 3.6.7, 4.1.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OP-TEEMbed TLS3.5.0 to before 3.6.7; 4.0.0 to before 4.1.23.6.7, 4.1.2Patch availableCNA
  • Mbed TLS VendorOP-TEE Affected 3.5.0 to before 3.6.7; 4.0.0 to before 4.1.2 Fixed in 3.6.7, 4.1.2 Patch available CNA

Remediation

  • Fix · CNA Mbed TLS (TrustedFirmware) Fixed in 3.6.7, 4.1.2

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-25832
  2. 2026-10-03 Alias added: GHSA-583p-89c4-mqq9

References

Other 2

  • TI-2021-09019 In Arm Trusted Firmware M through 1.2, the NS world may trigger a system halt, an… KEVCVSS 3.1MEDIUM 5.5
  • TI-2022-22796 OP-TEE Trusted OS vulnerable to Improper Validation of Array Index in the cleanup_shm_refs function CVSS 3.1HIGH 8.8
  • TI-2026-29072 OP-TEE has a Use-After-Free race in FF-A shared-memory teardown CVSS 3.1HIGH 7.8
  • TI-2025-29404 REE userspace code can panic TAs, leading to fTPM PCR reset and data disclosure CVSS 3.1HIGH 7.9
  • TI-2023-21925 OP-TEE double free in shdr_verify_signature CVSS 3.1HIGH 7.4
  • TI-2026-33359 OP-TEE vulnerable to ECDH private key recovery CVSS 3.1MEDIUM 4.7
See all 90 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences