CVE-2024-21386 | .NET Denial of Service Vulnerability

.NET Denial of Service Vulnerability

Published: 2024-02-13 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-21386 is rated Moderate Risk (59.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.39%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-21386

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-29 2.23% 2.39% +0.16%
2 2026-03-03 1.65% 2.23% +0.58%
3 2026-01-01 — 1.65% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-21386

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2024-21386

GitHub Security Advisory for CVE-2024-21386

GHSA-g74q-5xw3-j7q9 · Severity: high · Ecosystem: nuget — Microsoft Security Advisory CVE-2024-21386: .NET Denial of Service Vulnerability

OS Trackers for CVE-2024-21386

vendor priority summary link
alpine high CVE-2024-21386: 5 source package rows (dotnet6-build, dotnet6-runtime, dotnet7-build, dotnet7-runtime, dotnet8-runtime); 14 state rows across 5 repos (3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 14, open 0. https://security.alpinelinux.org/vuln/CVE-2024-21386
redhat high — https://access.redhat.com/security/cve/CVE-2024-21386
ubuntu medium CVE-2024-21386 medium priority: Ubuntu including 3 source packages (dotnet6, dotnet7, dotnet8), 21 status rows across 7 suites (bionic, focal, jammy, mantic, trusty, upstream, xenial): DNE 12, released 9. https://ubuntu.com/security/CVE-2024-21386

Affected software / configurations for CVE-2024-21386

Vendor Product Version Raw CPE
microsoft asp.net_core >= 6.0.0, < 6.0.27 cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*
microsoft asp.net_core >= 7.0.0, < 7.0.16 cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*
microsoft asp.net_core >= 8.0.0, < 8.0.2 cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*
microsoft visual_studio_2022 >= 17.4.0, < 17.4.16 cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
microsoft visual_studio_2022 >= 17.6.0, < 17.6.12 cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
microsoft visual_studio_2022 >= 17.8.0, < 17.8.7 cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*

References for CVE-2024-21386

cvelogic Threat Intelligence