How severe is CVE-2021-21773?

CVE-2021-21773 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-2021-21773 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21773?

CVE-2021-21773 affects Accusoft Imagegear. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21773?

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-2021-21773 published?

CVE-2021-21773 was published on 2021-03-31 and last updated on 2026-06-17.

CVE-2021-21773

CVE-2021-21773 is a high-severity vulnerability in Accusoft Imagegear 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-754.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-754
Affected product: Accusoft Imagegear
Published: 2021-03-31
Last modified: 2026-06-17

Description

An out-of-bounds write vulnerability exists in the TIFF header count-processing functionality of Accusoft ImageGear 19.8. A specially crafted malformed file can lead to memory corruption. An attacker can provide a malicious file to trigger this vulnerability.

Frequently asked questions

What is CVE-2021-21773?: An out-of-bounds write vulnerability exists in the TIFF header count-processing functionality of Accusoft ImageGear 19.8. A specially crafted malformed file can lead to memory corruption. An attacker can provide a malicious file to trigger this vulnerability.
How severe is CVE-2021-21773?: CVE-2021-21773 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-2021-21773 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21773?: CVE-2021-21773 affects Accusoft Imagegear. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21773?: 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-2021-21773 published?: CVE-2021-21773 was published on 2021-03-31 and last updated on 2026-06-17.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1227

Affected products (1)

cpe:2.3:a:accusoft:imagegear:19.8:*:*:*:*:*:*:*

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