---
title: "CVE-2024-43498: .NET Remote Code Execution Vulnerability"
url: https://erroneo.us/security/cve/CVE-2024-43498/
description: "CVE-2024-43498 (System.Formats.Nrbf (NuGet)): .NET and Visual Studio Remote Code Execution Vulnerability"
type: vulnerability-record
section: "Security Digest"
date_published: 2024-11-12
date_modified: 2025-07-08
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2024-43498"
kev: false
cvss: 9.2
epss: 0.03591
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2024-43498: .NET Remote Code Execution Vulnerability

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 3.6% , percentile 89: FIRST’s model estimates a 3.6% chance of exploitation activity in the next 30 days, higher than 89% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes System.Formats.Nrbf (NuGet) < 9.0.0, fixed in 9.0.0 . Check your lockfile, including transitive dependencies.

## What it is

.NET and Visual Studio Remote Code Execution Vulnerability

## Affected packages

- NuGet `System.Formats.Nrbf` < 9.0.0 → fixed: 9.0.0

## Affected products (CVE record)

- Microsoft PowerShell 7.5: 7.5.0 < 7.5.0
- Microsoft Microsoft Visual Studio 2022 version 17.8: 17.8.0 < 17.8.16
- Microsoft Microsoft Visual Studio 2022 version 17.6: 17.6.0 < 17.6.21
- Microsoft Microsoft Visual Studio 2022 version 17.10: 17.10 < 17.10.9
- Microsoft Microsoft Visual Studio 2022 version 17.11: 17.11 < 17.11.6
- Microsoft .NET 9.0: 9.0.0 < 9.0.0

## Severity

- microsoft CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C`
- GitHub CVSS 4.0: 9.2 `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 3.59% probability of exploitation activity in the next 30 days; percentile 89.

## Sources

- [.NET and Visual Studio Remote Code Execution Vulnerability](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43498)
- [GitHub Advisory GHSA-v7vf-f5q6-m899](https://github.com/advisories/GHSA-v7vf-f5q6-m899)
- [CVE.org record CVE-2024-43498](https://www.cve.org/CVERecord?id=CVE-2024-43498)
- [NVD entry CVE-2024-43498](https://nvd.nist.gov/vuln/detail/CVE-2024-43498)
- [github.com](https://github.com/dotnet/runtime/security/advisories/GHSA-v7vf-f5q6-m899)

---
Source page: https://erroneo.us/security/cve/CVE-2024-43498/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt