TrustedFirmware Mbed TLS up to 3.6.6/4.1.0 Entropy entropy

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in TrustedFirmware Mbed TLS up to 3.6.6/4.1.0. Affected by this vulnerability is an unknown functionality of the component Entropy. The manipulation results in entropy. This vulnerability was named CVE-2026-73064. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in TrustedFirmware Mbed TLS up to 3.6.6/4.1.0. It has been classified as problematic. Affected is an unknown part of the component Entropy. The manipulation with an unknown input leads to a entropy vulnerability. CWE is classifying the issue as CWE-331. The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others. This is going to have an impact on confidentiality. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-73064 since 08/10/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1600.001 by the MITRE ATT&CK project.

Upgrading to version 3.6.7 or 4.1.1 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.3

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 2.9
CNA Vector (MITRE): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Entropy
CWE: CWE-331 / CWE-330 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Mbed TLS 3.6.7/4.1.1

Timelineinfo

08/10/2026 CVE reserved
09/24/2026 +45 days Advisory disclosed
09/24/2026 +0 days VulDB entry created
09/24/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-73064 (🔒)
GCVE (CVE): GCVE-0-2026-73064
GCVE (VulDB): GCVE-100-409398

Entryinfo

Created: 09/24/2026 17:27
Changes: 09/24/2026 17:27 (65)
Complete: 🔍
Cache ID: 216::103

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