CVE-2020-13905Network attack vector

Memory corruption via invalid HDR byte write

Published Jun 10, 2020 · Updated Aug 4, 2024

Memory corruption in IrfanView 32-bit 4.54 allows context-dependent attackers to trigger an invalid write by supplying a crafted HDR file. The FORMATS.dll GetPlugInInfo routine writes a byte through an invalid destination pointer while parsing the untrusted HDR file. Exploitation requires a user to open the file with the 32-bit FORMATS plug-in, and published research establishes a user-mode access violation rather than code execution.

CVSS severity8.8
High
EPSS probability3.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in IrfanView 32-bit 4.54 allows context-dependent attackers to trigger an invalid write by supplying a crafted HDR file. The FORMATS.dll GetPlugInInfo routine writes a byte through an invalid destination pointer while parsing the untrusted HDR file. Exploitation requires a user to open the file with the 32-bit FORMATS plug-in, and published research establishes a user-mode access violation rather than code execution.

The record

CVE
CVE-2020-13905
Published
Jun 10, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 2020CVE 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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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