CVE-2026-73064 | BDVDB-2026-378577 Detail

trustedfirmwareMbed TLS

Description#

In Mbed TLS 3.2.0 though 3.6.6 and 4.0.0 through 4.1.0, an attacker who can cause an entropy source to fail can remove or inject bytes into the start of the TLS stream. This only affects TLS 1.3 servers.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact low, availability impact none. Attack vector: local.

Weaknesses#

CWE-394 Unexpected Status Code or Return Value

References#

Exploit#

No public exploit known

History#

Version 12026-09-24Record published in the CVE List.

Published

Published: 2026-09-24
Last modified: 2026-09-24

Vendor information

Vendor: trustedfirmware
Product: Mbed TLS

All trustedfirmware vulnerabilities

Score

2.9 Low

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 1.0.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 3.2.0 and < 3.6.7
Fixed
3.6.7
Vulnerable
>= 4.0.0 and < 4.1.1
Fixed
4.1.1

Scoring System

CVSS v4.0

Not available

CVSS v3.1

2.9 Low

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Metric breakdown
Attack Vector	Local
Attack Complexity	High
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).