CVE-2021-28953: The unofficial C/C++ Advanced Lint extension before 1.9.0 for Visual Studio Code allows attackers to execute a

Q: How do I fix CVE-2021-28953?

c\/c\+\+ advanced lint: upgrade to 1.9.0. Exact commands for each OS are on this page.

Q: Is CVE-2021-28953 being exploited?

CVE-2021-28953 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-28953 affect?

CVE-2021-28953 affects c\/c\+\+ advanced lint. Severity is high (CVSS 7.8). The unofficial C/C++ Advanced Lint extension before 1.9.0 for Visual Studio Code allows attackers to execute arbitrary binaries if the user opens a crafted repository.

This month

HIGH 7.8UPGRADE

CVE-2021-28953 is a high-severity flaw (CVSS 7.8) affecting c\/c\+\+ advanced lint. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The unofficial C/C++ Advanced Lint extension before 1.9.0 for Visual Studio Code allows attackers to execute arbitrary binaries if the user opens a crafted repository.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-427
Published	2021-03-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: c\/c\+\+ advanced lint project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-03-21 05:15 UTCPublished CVE record published
2026-06-17 03:47 UTCUpdated Record last modified

c\/c\+\+ advanced lint project c\/c\+\+ advanced lint UPGRADE

Affected: < 1.9.0

Fixed in: 1.9.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cc++-advanced-lint || rpm -q cc++-advanced-lint || cc++-advanced-lint --version

2. UPGRADE to 1.9.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cc++-advanced-lint

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cc++-advanced-lint

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-28953?

c\/c\+\+ advanced lint: upgrade to 1.9.0. Exact commands for each OS are on this page.

Is CVE-2021-28953 being exploited?

CVE-2021-28953 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-28953 affect?

CVE-2021-28953 affects c\/c\+\+ advanced lint. Severity is high (CVSS 7.8). The unofficial C/C++ Advanced Lint extension before 1.9.0 for Visual Studio Code allows attackers to execute arbitrary binaries if the user opens a crafted repository.

How urgent is CVE-2021-28953?

Priority 43/100. High severity

Software pages

Visual Studio vulnerabilities

References

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