CVE-2023-21808 | .NET and Visual Studio Remote Code Execution Vulnerability

.NET and Visual Studio Remote Code Execution Vulnerability

Published: 2023-02-14 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-21808 is rated Moderate Risk (53/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.15%). 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-2023-21808

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 2026-06-15 1.28% 1.15% -0.13%
2 2026-03-04 1.07% 1.28% +0.21%
3 2025-11-21 — 1.07% —

Full EPSS history (36 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-21808

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
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:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]

Weakness enumeration for CVE-2023-21808

GitHub Security Advisory for CVE-2023-21808

GHSA-824j-wqm8-89mj · Severity: high · Ecosystem: nuget — .NET Remote Code Execution Vulnerability

OS Trackers for CVE-2023-21808

vendor priority summary link
alpine — CVE-2023-21808: 4 source package rows (dotnet6-build, dotnet6-runtime, dotnet7-build, dotnet7-runtime); 18 state rows across 5 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, edge-community); fixed 18, open 0. https://security.alpinelinux.org/vuln/CVE-2023-21808
redhat high — https://access.redhat.com/security/cve/CVE-2023-21808
ubuntu medium CVE-2023-21808 medium priority: Ubuntu including 2 source packages (dotnet6, dotnet7), 16 status rows across 8 suites (bionic, focal, jammy, kinetic, lunar, trusty, upstream, xenial): DNE 8, not-affected 6, released 2. https://ubuntu.com/security/CVE-2023-21808

Affected software / configurations for CVE-2023-21808

Vendor Product Version Raw CPE
microsoft .net 6.0.0 cpe:2.3:a:microsoft:.net:6.0.0:*:*:*:*:*:*:*
microsoft .net 7.0.0 cpe:2.3:a:microsoft:.net:7.0.0:*:*:*:*:*:*:*
microsoft visual_studio_2017 >= 15.0, < 15.9.51 cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*
microsoft visual_studio_2019 >= 16.0, < 16.11.24 cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*
microsoft visual_studio_2022 17.0 cpe:2.3:a:microsoft:visual_studio_2022:17.0:*:*:*:*:*:*:*
microsoft visual_studio_2022 17.2 cpe:2.3:a:microsoft:visual_studio_2022:17.2:*:*:*:*:*:*:*
microsoft visual_studio_2022 17.4 cpe:2.3:a:microsoft:visual_studio_2022:17.4:*:*:*:*:*:*:*
microsoft .net_framework 3.5 cpe:2.3:a:microsoft:.net_framework:3.5:*:*:*:*:*:*:*
microsoft .net_framework 4.8 cpe:2.3:a:microsoft:.net_framework:4.8:*:*:*:*:*:*:*
microsoft .net_framework 4.7.2 cpe:2.3:a:microsoft:.net_framework:4.7.2:*:*:*:*:*:*:*
microsoft .net_framework 4.8.1 cpe:2.3:a:microsoft:.net_framework:4.8.1:*:*:*:*:*:*:*
microsoft .net_framework 4.6.2 cpe:2.3:a:microsoft:.net_framework:4.6.2:*:*:*:*:*:*:*
microsoft .net_framework 4.7 cpe:2.3:a:microsoft:.net_framework:4.7:*:*:*:*:*:*:*
microsoft .net_framework 4.7.1 cpe:2.3:a:microsoft:.net_framework:4.7.1:*:*:*:*:*:*:*

References for CVE-2023-21808

cvelogic Threat Intelligence