VDB-328337 · CVE-2025-55248 · Nessus 270659

Microsoft .NET Framework inadequate encryption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.5	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Microsoft .NET Framework. This impacts an unknown function. The manipulation leads to inadequate encryption. This vulnerability is uniquely identified as CVE-2025-55248. The attack is possible to be carried out remotely. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in Microsoft .NET Framework (affected version not known). It has been rated as problematic. This issue affects some unknown functionality. The manipulation with an unknown input leads to a inadequate encryption vulnerability. Using CWE to declare the problem leads to CWE-326. The product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required. Impacted is confidentiality. The summary by CVE is:

Inadequate encryption strength in .NET, .NET Framework, Visual Studio allows an authorized attacker to disclose information over a network.

The weakness was disclosed 10/14/2025 as confirmed security update guide (Website). The advisory is shared at msrc.microsoft.com. The identification of this vulnerability is CVE-2025-55248. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 270659 (RHEL 9 : .NET 8.0 (RHSA-2025:18256)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (270659) and CERT Bund (WID-SEC-2025-2278). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

Microsoft PowerShell
Red Hat Enterprise Linux
Ubuntu Linux
Oracle Linux
Microsoft ASP.NET
RESF Rocky Linux
Microsoft Windows Server 2012
Microsoft .NET Framework
Microsoft Windows Server 2012 R2
Microsoft Windows Server 2016
Microsoft Windows Server 2019
Microsoft Windows Server 2022
Microsoft Windows
Microsoft Visual Studio 2017
Microsoft Visual Studio 2019
Microsoft Visual Studio 2022
Octopus Deploy Octopus Deploy

Productinfo

Type

Programming Language Software

Vendor

Microsoft

Name

.NET Framework

License

free

Website

Vendor: https://www.microsoft.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.5

VulDB Base Score: 3.7
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 4.8
Vendor Vector (Microsoft): 🔒

NVD Base Score: 5.7
NVD Vector: 🔒

CNA Base Score: 4.8
CNA Vector (Microsoft): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Inadequate encryption
CWE: CWE-326 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Unproven

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 270659
Nessus Name: RHEL 9 : .NET 8.0 (RHSA-2025:18256)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔒
0-Day Time: 🔒
Exposure Time: 🔒

Timelineinfo

10/14/2025 VulDB entry created
10/14/2025 +0 days Advisory disclosed
10/14/2025 +0 days Countermeasure disclosed
11/11/2025 +28 days VulDB entry last update

Sourcesinfo

Vendor: microsoft.com

Advisory: msrc.microsoft.com
Status: Confirmed

CVE: CVE-2025-55248 (🔒)
GCVE (CVE): GCVE-0-2025-55248
GCVE (VulDB): GCVE-100-328337
CERT Bund: WID-SEC-2025-2278 - Microsoft Developer Tools: Mehrere Schwachstellen

Entryinfo

Created: 10/14/2025 19:15
Updated: 11/11/2025 09:57
Changes: 10/14/2025 19:15 (31), 10/14/2025 19:18 (37), 10/17/2025 01:40 (2), 10/24/2025 02:23 (21), 11/11/2025 09:57 (7)
Complete: 🔍
Cache ID: 216::103

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