How severe is CVE-2021-39823?

CVE-2021-39823 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-39823 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39823?

CVE-2021-39823 affects Adobe Svg-native-viewer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39823?

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-2021-39823 published?

CVE-2021-39823 was published on 2021-09-27 and last updated on 2026-06-17.

CVE-2021-39823

CVE-2021-39823 is a high-severity vulnerability in Adobe Svg-native-viewer with a CVSS 3.x base score of 7.8. 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-122.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-122
Affected product: Adobe Svg-native-viewer
Published: 2021-09-27
Last modified: 2026-06-17

Description

Adobe svg-native-viewer 8182d14dfad5d1e10f53ed830328d7d9a3cfa96d and earlier versions are affected by a heap buffer overflow vulnerability due to insecure handling of a malicious .svg file, potentially resulting in arbitrary code execution in the context of the current user. User interaction is required to exploit this vulnerability.

Frequently asked questions

What is CVE-2021-39823?: Adobe svg-native-viewer 8182d14dfad5d1e10f53ed830328d7d9a3cfa96d and earlier versions are affected by a heap buffer overflow vulnerability due to insecure handling of a malicious .svg file, potentially resulting in arbitrary code execution in the context of the current user. User interaction is required to exploit this vulnerability.
How severe is CVE-2021-39823?: CVE-2021-39823 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-39823 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39823?: CVE-2021-39823 affects Adobe Svg-native-viewer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39823?: 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-2021-39823 published?: CVE-2021-39823 was published on 2021-09-27 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/svg-native-viewer/apsb21-72.html

Affected products (1)

cpe:2.3:a:adobe:svg-native-viewer:*:*:*:*:*:*:*:*

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