Is there a public exploit for CVE-2021-4043?

Yes. Proof-of-concept code for CVE-2021-4043 has been published publicly.

Is there a proof of concept for CVE-2021-4043?

Yes — 1 proof-of-concept entry is linked on this page, from public repositories and community submissions. They are listed for authorised testing only.

How severe is CVE-2021-4043?

CVE-2021-4043 scores CVSS 5.8 (v3.0), rated medium. EPSS puts the chance of exploitation in the next 30 days at 4.61%.

What does CVE-2021-4043 affect?

CVE-2021-4043 affects GPAC gpac/gpac.

5.8 Medium

NULL Pointer Dereference in GitHub repository gpac/gpac prior to 1.1.0.

CVE-2021-4043

Proof-of-concept code is published

Public PoC

Public PoCcyberark/PwnKit-Hunter29 stars

Signals come from Exploit-DB, Metasploit, Nuclei and published proof-of-concept repositories. Their absence means nothing was found, not that nothing exists.

Assessment

CVSS: 5.8 (v3.0)
Severity: Medium
EPSS: 4.61% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Public PoC
Published: 4 February 2022
Last updated: 3 November 2026
Affected: GPAC · gpac/gpac
Assigner: @huntrdev

CVSS vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

At the source

EUVD (ENISA)

References

Community proofs of concept

No community proof of concept yet. If you have one for a published vulnerability and the right to share it, add it below — it will appear here once reviewed.

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Before you submit * This vulnerability is already publicly disclosed (it has a published CVE). This material comes only from testing I was authorised to perform. I have the legal right to publish this content and am not breaching any agreement by doing so. It contains no live credentials, personal data, or anything targeting systems I am not authorised to test. I understand it will be reviewed before it appears publicly and may be rejected. I agree to the submission terms.

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Query this programmatically

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