CVE-2024-9261

Code execution via unchecked SID stack copy

Published Nov 22, 2024 · Updated Nov 25, 2024

Stack-based buffer overflow in the SID parser in IrfanView 4.66 allows remote attackers to execute code via a crafted SID file. The parser copies attacker-controlled data into a stack buffer without first validating its length, allowing the copy to overwrite adjacent stack memory. Exploitation requires the target to visit a malicious page or open the file and runs code in the context of the IrfanView process.

CVSS severity7.8
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in the SID parser in IrfanView 4.66 allows remote attackers to execute code via a crafted SID file. The parser copies attacker-controlled data into a stack buffer without first validating its length, allowing the copy to overwrite adjacent stack memory. Exploitation requires the target to visit a malicious page or open the file and runs code in the context of the IrfanView process.

The record

CVE
CVE-2024-9261
Published
Nov 22, 2024
Updated
Nov 25, 2024
Vendor
IrfanView Software
Product
IrfanView
Classifications
CWE-787, CWE-121, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 25, 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?

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

  1. Affected versionversion=4.66 <4.67
  2. Affected versionversion=4.66 64bit

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

IrfanView Software · IrfanViewversion=4.66 <4.67; version=4.66 64bit

Published CVSS scores

7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:N/UI:R/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-121Stack-based Buffer Overflow
T1203Exploitation for Client Execution

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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