CVE-2025-59438
MEDIUM
5.3
CVSS Score
Published: October 21, 2025 at 12:00 AM UTC
Updated: June 17, 2026 at 09:46 AM UTC
2 products affected across 2 vendorsmbed TLSMbedtls
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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit
Description
Mbed TLS through 3.6.4 has an Observable Timing Discrepancy.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v ≤ 3.6.4
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (2)
Vendor Advisory
Source: cverecord
https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/Vendor Advisory
Source: cverecord
https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2025-10-invalid-padding-error/SSVC — Action Prioritization
SSVCNo known exploitNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
5.3MEDIUMCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- LOW
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusANALYZED
CWE
CWE-208
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