CVE-2021-1639

Code execution through undisclosed input handling

Published Feb 25, 2021 · Updated Aug 3, 2024

Remote code execution in Microsoft Visual Studio and Visual Studio Code allows local users to execute code after user interaction. Microsoft has not published the affected component, input vector, or incorrect operation that permits execution. The affected state spans Visual Studio 2017 and 2019 and Visual Studio Code, but the public record does not distinguish the triggering workflow.

CVSS severity7.0
High
EPSS probability2.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Microsoft Visual Studio and Visual Studio Code allows local users to execute code after user interaction. Microsoft has not published the affected component, input vector, or incorrect operation that permits execution. The affected state spans Visual Studio 2017 and 2019 and Visual Studio Code, but the public record does not distinguish the triggering workflow.

The record

CVE
CVE-2021-1639
Published
Feb 25, 2021
Updated
Aug 3, 2024
Vendor
Microsoft
Product
Microsoft Visual Studio 2019
Classifications
Unavailable
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 25, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=16.0.0 <publication
  2. Affected versionversion=16.0 <publication

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Visual Studio 2019version=16.0.0 <publication; version=16.0 <publication
Microsoft · Visual Studio Codeversion=1.0.0 <publication
Microsoft · Microsoft Visual Studio 2017version=15.9.0 <publication

Published CVSS scores

7.0Microsoft CorporationCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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