How severe is CVE-2021-28276?

CVE-2021-28276 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-28276 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-2021-28276?

CVE-2021-28276 primarily affects Jhead Project Jhead. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-28276?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-28276 published?

CVE-2021-28276 was published on 2022-03-23 and last updated on 2026-06-17.

CVE-2021-28276

CVE-2021-28276 is a high-severity vulnerability in Jhead Project Jhead with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Jhead Project Jhead
Published: 2022-03-23
Last modified: 2026-06-17

Description

A Denial of Service vulnerability exists in jhead 3.04 and 3.05 via a wild address read in the ProcessCanonMakerNoteDir function in makernote.c.

Frequently asked questions

What is CVE-2021-28276?: A Denial of Service vulnerability exists in jhead 3.04 and 3.05 via a wild address read in the ProcessCanonMakerNoteDir function in makernote.c.
How severe is CVE-2021-28276?: CVE-2021-28276 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-28276 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-2021-28276?: CVE-2021-28276 primarily affects Jhead Project Jhead. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-28276?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-28276 published?: CVE-2021-28276 was published on 2022-03-23 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:jhead_project:jhead:3.04:*:*:*:*:*:*:*
cpe:2.3:a:jhead_project:jhead:3.05:*:*:*:*:*:*:*

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