mbed TLS up to 3.6.5 entropy

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability was found in mbed TLS up to 3.6.5. It has been rated as problematic. This vulnerability affects unknown code. Performing a manipulation results in entropy. This vulnerability was named CVE-2026-25835. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in mbed TLS up to 3.6.5. This affects an unknown function. The manipulation with an unknown input leads to a entropy vulnerability. CWE is classifying the issue as CWE-332. The lack of entropy available for, or used by, a Pseudo-Random Number Generator (PRNG) can be a stability and security threat. This is going to have an impact on confidentiality. The summary by CVE is:

Mbed TLS before 3.6.6 and TF-PSA-Crypto before 1.1.0 misuse seeds in a Pseudo-Random Number Generator (PRNG).

The advisory is shared at mbed-tls.readthedocs.io. This vulnerability is uniquely identified as CVE-2026-25835 since 02/06/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600.001 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 315270 (SUSE SLES15 Security Update : ovmf (SUSE-SU-2026:1952-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.6.6 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (315270) and EUVD (EUVD-2026-17999). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.6

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

ADP CISA Base Score: 7.7
ADP CISA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Entropy
CWE: CWE-332 / CWE-331 / CWE-330
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 315270
Nessus Name: SUSE SLES15 Security Update : ovmf (SUSE-SU-2026:1952-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: mbed TLS 3.6.6

Timelineinfo

02/06/2026 CVE reserved
04/01/2026 +53 days Advisory disclosed
04/01/2026 +0 days VulDB entry created
06/02/2026 +62 days VulDB entry last update

Sourcesinfo

Advisory: mbed-tls.readthedocs.io
Status: Confirmed

CVE: CVE-2026-25835 (🔒)
GCVE (CVE): GCVE-0-2026-25835
GCVE (VulDB): GCVE-100-354753
EUVD: 🔒

Entryinfo

Created: 04/01/2026 20:55
Updated: 06/02/2026 15:48
Changes: 04/01/2026 20:55 (53), 04/02/2026 01:37 (1), 05/19/2026 19:57 (2), 06/02/2026 15:48 (11)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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