CVE-2021-27362Public exploitNetwork attack vector

Code execution via freed-memory indirect call

Published Feb 17, 2021 · Updated Aug 3, 2024

Out-of-bounds read in IrfanView 4.57 with WPG plugin before 3.1.0.0 allows remote attackers to execute code via a crafted WPG file. WPG!ReadWPG_W calls through a pointer to freed or unallocated memory, allowing file-controlled data to redirect control flow. Exploitation requires a user to open the malicious file; demonstrated outcomes include an application crash and exploitable control-flow corruption.

CVSS severity9.8
Critical
EPSS probability4.48%
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 IrfanView 4.57 with WPG plugin before 3.1.0.0 allows remote attackers to execute code via a crafted WPG file. WPG!ReadWPG_W calls through a pointer to freed or unallocated memory, allowing file-controlled data to redirect control flow. Exploitation requires a user to open the malicious file; demonstrated outcomes include an application crash and exploitable control-flow corruption.

The record

CVE
CVE-2021-27362
Published
Feb 17, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 17, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1204.002Malicious File

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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