CVE-2021-3272Public exploit

Application crash via mismatched channel-component counts

Published Jan 27, 2021 · Updated Aug 3, 2024

Out-of-bounds read in JasPer 2.0.24 allows context-dependent attackers to crash applications via a crafted JPEG-2000 image. jp2_decode indexes its channel-to-component lookup beyond the allocated component array when declared channel and image-component counts are inconsistent. Processing the file requires user interaction, and the published proof of concept demonstrates an application abort rather than code execution or data modification.

CVSS severity5.5
Medium
EPSS probability1.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in JasPer 2.0.24 allows context-dependent attackers to crash applications via a crafted JPEG-2000 image. jp2_decode indexes its channel-to-component lookup beyond the allocated component array when declared channel and image-component counts are inconsistent. Processing the file requires user interaction, and the published proof of concept demonstrates an application abort rather than code execution or data modification.

The record

CVE
CVE-2021-3272
Published
Jan 27, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1203Exploitation for Client Execution

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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