How severe is CVE-2021-21938?

CVE-2021-21938 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-2021-21938 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21938?

CVE-2021-21938 affects Accusoft Imagegear. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21938?

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-2021-21938 published?

CVE-2021-21938 was published on 2022-04-14 and last updated on 2026-06-17.

CVE-2021-21938

CVE-2021-21938 is a critical-severity vulnerability in Accusoft Imagegear 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-193.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 6.8
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-193
Affected product: Accusoft Imagegear
Published: 2022-04-14
Last modified: 2026-06-17

Description

A heap-based buffer overflow vulnerability exists in the Palette box parser functionality of Accusoft ImageGear 19.10. A specially-crafted file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.

Frequently asked questions

What is CVE-2021-21938?: A heap-based buffer overflow vulnerability exists in the Palette box parser functionality of Accusoft ImageGear 19.10. A specially-crafted file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.
How severe is CVE-2021-21938?: CVE-2021-21938 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-2021-21938 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21938?: CVE-2021-21938 affects Accusoft Imagegear. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21938?: 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-2021-21938 published?: CVE-2021-21938 was published on 2022-04-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:accusoft:imagegear:19.10:*:*:*:*:*:*:*

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