CVE-2021-21945Public exploitNetwork attack vector

Memory corruption via unchecked planar TIFF copy

Published Apr 14, 2022 · Updated Apr 15, 2025

Heap-based buffer overflow in Accusoft ImageGear 19.10 allows attackers to corrupt memory by supplying a crafted planar TIFF file. The FUN_10074d50 TIFF sub-parser copies the second 12-bit sample into a destination buffer without checking the sample-derived offset against its allocation. Triggering requires TIFF tags that select 12-bit planar parsing with multiple samples and strips or tiles; the demonstrated result is an access-violation crash in the embedding process.

CVSS severity9.8
Critical
EPSS probability1.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Accusoft ImageGear 19.10 allows attackers to corrupt memory by supplying a crafted planar TIFF file. The FUN_10074d50 TIFF sub-parser copies the second 12-bit sample into a destination buffer without checking the sample-derived offset against its allocation. Triggering requires TIFF tags that select 12-bit planar parsing with multiple samples and strips or tiles; the demonstrated result is an access-violation crash in the embedding process.

The record

CVE
CVE-2021-21945
Published
Apr 14, 2022
Updated
Apr 15, 2025
Vendor
Accusoft
Product
ImageGear
Classifications
CWE-122, CWE-787
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=19.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Accusoft · ImageGearversion=19.10

Published CVSS scores

9.8Cisco TalosCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NISTAV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-787Out-of-bounds Write

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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