What is CVE-2021-21773?

CVE-2021-21773 is a high-severity vulnerability in Accusoft Imagegear, classified under Incorrect Calculation of Buffer Size. CVSS score: 7.8/10. Published 2021-03-31.

How severe is CVE-2021-21773?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Accusoft Imagegear

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.

Published 2021-03-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (50.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Accusoft Imagegear — versions 19.8
Accusoft — versions Accusoft ImageGear 19.8

Weakness classification (CWE)

References

talosintelligence.com/vulnerability_reports/TALOS-2021-1227 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-21773?: CVE-2021-21773 is a high-severity vulnerability in Accusoft Imagegear, classified under Incorrect Calculation of Buffer Size. CVSS score: 7.8/10. Published 2021-03-31.
How severe is CVE-2021-21773?: High severity. CVSS v3 base score is 7.8 out of 10.