CVE-2021-21833

Name: CVE-2021-21833
Creator: NVD / NIST
Published: 2021-06-11T17:15:10.503+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.43%

Last modified Jun 17, 2026

CVE-2021-21833 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An improper array index validation vulnerability exists in the TIF IP_planar_raster_unpack functionality of Accusoft ImageGear 19.9. A specially crafted malformed file can lead to an out-of-bounds write. EPSS estimates a 1.43% chance of exploitation in the next 30 days.

Description

An improper array index validation vulnerability exists in the TIF IP_planar_raster_unpack functionality of Accusoft ImageGear 19.9. A specially crafted malformed file can lead to an out-of-bounds write. An attacker can provide a malicious file to trigger this vulnerability.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.43%

69.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Accusoft	Imagegear	19.9

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1296Exploit, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1296Exploit, Third Party Advisory

Timeline

Published: Jun 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21833?

How severe is CVE-2021-21833?

CVE-2021-21833 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.43% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21833?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21833?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST