How severe is CVE-2019-7321?

CVE-2019-7321 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-7321 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-7321?

CVE-2019-7321 affects Artifex Mupdf. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-7321?

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

When was CVE-2019-7321 published?

CVE-2019-7321 was published on 2019-06-13 and last updated on 2026-06-17.

CVE-2019-7321

CVE-2019-7321 is a critical-severity vulnerability in Artifex Mupdf with a CVSS 3.x base score of 9.8. 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-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Artifex Mupdf
Published: 2019-06-13
Last modified: 2026-06-17

Description

Usage of an uninitialized variable in the function fz_load_jpeg in Artifex MuPDF 1.14 can result in a heap overflow vulnerability that allows an attacker to execute arbitrary code.

Frequently asked questions

What is CVE-2019-7321?: Usage of an uninitialized variable in the function fz_load_jpeg in Artifex MuPDF 1.14 can result in a heap overflow vulnerability that allows an attacker to execute arbitrary code.
How severe is CVE-2019-7321?: CVE-2019-7321 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-7321 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-7321?: CVE-2019-7321 affects Artifex Mupdf. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-7321?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-7321 published?: CVE-2019-7321 was published on 2019-06-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:artifex:mupdf:1.14.0:*:*:*:*:*:*:*

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