CVE-2013-3941Network attack vector

Code execution via malformed JPEG2000 markers

Published Jan 2, 2020 · Updated Aug 6, 2024

Memory corruption in XnSoft XnView Classic before 2.13 allows remote attackers to execute arbitrary code through a crafted JPEG2000 file. Xjp2.dll allocates memory incorrectly for the Csiz parameter in a SIZ marker and fails to bound the lqcd field in a QCD marker, causing a heap-based buffer overflow. Processing attacker-supplied JPEG2000 content is the gate, and successful exploitation runs code in the application's security context.

CVSS severity9.8
Critical
EPSS probability2.76%
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 XnSoft XnView Classic before 2.13 allows remote attackers to execute arbitrary code through a crafted JPEG2000 file. Xjp2.dll allocates memory incorrectly for the Csiz parameter in a SIZ marker and fails to bound the lqcd field in a QCD marker, causing a heap-based buffer overflow. Processing attacker-supplied JPEG2000 content is the gate, and successful exploitation runs code in the application's security context.

The record

CVE
CVE-2013-3941
Published
Jan 2, 2020
Updated
Aug 6, 2024
Vendor
XnSoft
Product
XnView Classic
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 2, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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=before 2.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

XnSoft · XnView Classicversion=before 2.13

Published CVSS scores

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

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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