Mbed TLS up to 2.28.9/3.6.2 TLS Finished Message uninitialized resource

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Mbed TLS up to 2.28.9/3.6.2. This impacts an unknown function of the component TLS Finished Message Handler. This manipulation causes uninitialized resource. This vulnerability is tracked as CVE-2025-27810. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mbed TLS up to 2.28.9/3.6.2. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component TLS Finished Message Handler. The manipulation with an unknown input leads to a uninitialized resource vulnerability. The CWE definition for the vulnerability is CWE-908. The product uses or accesses a resource that has not been initialized. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Mbed TLS before 2.28.10 and 3.x before 3.6.3, in some cases of failed memory allocation or hardware errors, uses uninitialized stack memory to compose the TLS Finished message, potentially leading to authentication bypasses such as replays.

The advisory is shared at github.com. This vulnerability is known as CVE-2025-27810 since 03/07/2025. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 276298 (TencentOS Server 4: mbedtls (TSSA-2025:0337)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.28.10 or 3.6.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (276298) and EUVD (EUVD-2025-14831). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.8
NVD Vector: 🔍

CNA Base Score: 5.4
CNA Vector (MITRE): 🔍

CVSSv2info

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

Exploitinginfo

Class: Uninitialized resource
CWE: CWE-908
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: 276298
Nessus Name: TencentOS Server 4: mbedtls (TSSA-2025:0337)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: TLS 2.28.10/3.6.3

Timelineinfo

03/07/2025 🔍
03/25/2025 +18 days 🔍
03/25/2025 +0 days 🔍
11/24/2025 +244 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2025-27810 (🔍)
GCVE (CVE): GCVE-0-2025-27810
GCVE (VulDB): GCVE-100-301057
EUVD: 🔍

Entryinfo

Created: 03/25/2025 07:13
Updated: 11/24/2025 05:22
Changes: 03/25/2025 07:13 (63), 05/27/2025 02:03 (1), 10/30/2025 16:30 (12), 11/24/2025 05:22 (2)
Complete: 🔍
Cache ID: 216::103

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

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