How severe is CVE-2020-19499?

CVE-2020-19499 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-19499 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-19499?

CVE-2020-19499 affects Struktur Libheif. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-19499?

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-2020-19499 published?

CVE-2020-19499 was published on 2021-07-21 and last updated on 2026-06-17.

CVE-2020-19499

CVE-2020-19499 is a high-severity vulnerability in Struktur Libheif with a CVSS 3.x base score of 8.8. 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-125.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Struktur Libheif
Published: 2021-07-21
Last modified: 2026-06-17

Description

An issue was discovered in heif::Box_iref::get_references in libheif 1.4.0, allows attackers to cause a Denial of Service or possibly other unspecified impact due to an invalid memory read.

Frequently asked questions

What is CVE-2020-19499?: An issue was discovered in heif::Box_iref::get_references in libheif 1.4.0, allows attackers to cause a Denial of Service or possibly other unspecified impact due to an invalid memory read.
How severe is CVE-2020-19499?: CVE-2020-19499 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-19499 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-19499?: CVE-2020-19499 affects Struktur Libheif. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-19499?: 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-2020-19499 published?: CVE-2020-19499 was published on 2021-07-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:struktur:libheif:1.4.0:*:*:*:*:*:*:*

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Other CWE-125 (Out-of-bounds Read) vulnerabilities

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