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CVE-2024-43499

23
FAUCET Score

CVE-2024-43499 is a Denial of Service vulnerability affecting .NET and Visual Studio across Apple, Linux, and Microsoft platforms. With a CVSS score of 7.5 (High), it can be exploited remotely without user interaction, leading to a denial of service. While not currently on CISA's KEV catalog, there is no public exploit code available, and it has received limited community discussion and media coverage, though it was addressed in Microsoft's November 2024 Patch Tuesday.

Impacted Technologies

VendorProductVersion(s)CPE
9.0.0CPE matchmatch criteria
cpe:2.3:a:microsoft:.net:9.0.0:*:*:*:*:*:*:*
>= 17.6, < 17.6.21CPE matchmatch criteria
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
>= 17.8, < 17.8.16CPE matchmatch criteria
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
>= 17.10.0, <= 17.10.9CPE matchmatch criteria
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
>= 17.11.0, < 17.11.6CPE matchmatch criteria
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.56%
Probability of exploitation in next 30 days
EPSS Percentile
83.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0256 is in the 71st percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (13)

microsoftpatch availablevia msrc
Product: .NET 9.0 installed on WindowsFixed in: 9.0.0
View patch
microsoftpatch availablevia msrc
Product: .NET 9.0 installed on LinuxFixed in: 9.0.0
View patch
microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Visual Studio 2022 version 17.6Fixed in: 17.6.21
View patch
microsoftpatch availablevia msrc
Product: Microsoft Visual Studio 2022 version 17.10Fixed in: 17.10.9
View patch
microsoftpatch availablevia msrc
Product: Microsoft Visual Studio 2022 version 17.8Fixed in: 17.8.16
View patch
microsoftpatch availablevia msrc
Product: Microsoft Visual Studio 2022 version 17.11Fixed in: 17.11.6
View patch
microsoftpatch availablevia msrc
Product: PowerShell 7.5 installed on MacOSFixed in: 7.5.0
View patch
microsoftpatch availablevia msrc
Product: PowerShell 7.5 installed on LinuxFixed in: 7.5.0
View patch
microsoftpatch availablevia msrc
Product: PowerShell 7.5 installed on WindowsFixed in: 7.5.0
View patch
microsoftpatch availablevia msrc
Product: .NET 9.0 installed on Mac OSFixed in: 9.0.0
View patch
nugetpatch availablevia ghsa
Product: System.Formats.NrbfFixed in: 9.0.0
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: dotnet9.0-0:9.0.100-1.el9_5
View patch

Vendor Advisories (3)

nugetGHSA-6x36-qxmj-rv4phigh

.NET Denial of Service Vulnerability

Nov 12, 2024
microsoft2024-Nov/CVE-2024-43499Important

.NET and Visual Studio Denial of Service Vulnerability

Nov 12, 2024
redhatCVE-2024-43499Important

dotnet: .NET Core - DoS - (unbounded work factor) in NrbfDecoder component

Nov 12, 2024

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2024-43499
PatchVendor Advisory