How severe is CVE-2021-31261?

CVE-2021-31261 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-31261 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31261?

CVE-2021-31261 affects Gpac. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31261?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-31261 published?

CVE-2021-31261 was published on 2021-04-19 and last updated on 2026-06-17.

CVE-2021-31261

CVE-2021-31261 is a medium-severity vulnerability in Gpac with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Gpac
Published: 2021-04-19
Last modified: 2026-06-17

Description

The gf_hinter_track_new function in GPAC 1.0.1 allows attackers to read memory via a crafted file in the MP4Box command.

Frequently asked questions

What is CVE-2021-31261?: The gf_hinter_track_new function in GPAC 1.0.1 allows attackers to read memory via a crafted file in the MP4Box command.
How severe is CVE-2021-31261?: CVE-2021-31261 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-31261 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31261?: CVE-2021-31261 affects Gpac. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31261?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-31261 published?: CVE-2021-31261 was published on 2021-04-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gpac:gpac:1.0.1:*:*:*:*:*:*:*

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