CVE-2020-23565Public exploit

Arbitrary code execution via crafted JPEG 2000

Published Nov 5, 2021 · Updated Aug 4, 2024

Arbitrary code execution in IrfanView 4.53 allows attackers to execute code via a crafted JPEG 2000 image file. The JPEG2000!ShowPlugInSaveOptions_W routine uses data from a faulting address to control branch selection while parsing the file. Exploitation requires a local user to open the crafted image, after which code runs with the IrfanView process privileges and can affect confidentiality, integrity, and availability.

CVSS severity7.8
High
EPSS probability1.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary code execution in IrfanView 4.53 allows attackers to execute code via a crafted JPEG 2000 image file. The JPEG2000!ShowPlugInSaveOptions_W routine uses data from a faulting address to control branch selection while parsing the file. Exploitation requires a local user to open the crafted image, after which code runs with the IrfanView process privileges and can affect confidentiality, integrity, and availability.

The record

CVE
CVE-2020-23565
Published
Nov 5, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 5, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

7.8NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NVDAV: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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