Microsoft .NET/Visual Studio up to 18.8 integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft .NET and Visual Studio 8.0/9.0/10.0/17.14/18.8. It has been classified as problematic. This impacts an unknown function. Performing a manipulation results in integer overflow. This vulnerability is reported as CVE-2026-62886. The attack requires a local approach. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in Microsoft .NET and Visual Studio 8.0/9.0/10.0/17.14/18.8. It has been classified as problematic. This affects an unknown code block. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on integrity, and availability. The summary by CVE is:

Integer overflow or wraparound in .NET allows an unauthorized attacker to elevate privileges locally.

The advisory is shared at msrc.microsoft.com. This vulnerability is uniquely identified as CVE-2026-62886 since 07/14/2026. The exploitability is told to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/12/2026).

The vulnerability scanner Nessus provides a plugin with the ID 344819 (Microsoft .NET Framework (September 2026)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the databases at Tenable (344819) and CERT Bund (WID-SEC-2026-2761). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Microsoft PowerShell
  • Red Hat Enterprise Linux
  • Fedora Linux
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2022
  • Microsoft .NET Framework
  • Microsoft Visual Studio Code
  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows Server 2025
  • RESF Rocky Linux
  • Microsoft Windows
  • Microsoft .NET
  • Ubuntu Linux
  • Oracle Linux
  • Microsoft Visual Studio 2022
  • Microsoft Visual Studio 2026

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 344819
Nessus Name: Microsoft .NET Framework (September 2026)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/14/2026 CVE reserved
08/11/2026 +28 days Advisory disclosed
08/11/2026 +0 days VulDB entry created
09/12/2026 +32 days VulDB entry last update

Sourcesinfo

Vendor: microsoft.com

Advisory: msrc.microsoft.com
Status: Confirmed

CVE: CVE-2026-62886 (🔒)
GCVE (CVE): GCVE-0-2026-62886
GCVE (VulDB): GCVE-100-388617
CERT Bund: WID-SEC-2026-2761 - Microsoft Developer Tools: Mehrere Schwachstellen

Entryinfo

Created: 08/11/2026 22:51
Updated: 09/12/2026 07:58
Changes: 08/11/2026 22:51 (53), 08/15/2026 02:18 (7), 08/20/2026 05:51 (1), 09/12/2026 07:58 (2)
Complete: 🔍
Cache ID: 216::103

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

Discussion

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