CVE-2013-3937

Code execution via crafted BMP bit depth

Published Jan 2, 2020 · Updated Aug 6, 2024

Heap-based buffer overflow in xnview.exe in XnView before 2.13 allows remote attackers to execute code through a crafted BMP file. The BMP parser uses attacker-controlled biBitCount metadata while processing the image and writes beyond a heap buffer. Exploitation requires a user to open the file, after which attacker-controlled code runs with the application's privileges.

CVSS severity7.8
High
EPSS probability1.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in xnview.exe in XnView before 2.13 allows remote attackers to execute code through a crafted BMP file. The BMP parser uses attacker-controlled biBitCount metadata while processing the image and writes beyond a heap buffer. Exploitation requires a user to open the file, after which attacker-controlled code runs with the application's privileges.

The record

CVE
CVE-2013-3937
Published
Jan 2, 2020
Updated
Aug 6, 2024
Vendor
XnSoft
Product
XnView Classic
Classifications
CWE-787, T1204.002
Attack vector
local
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 vectorlocal
Required privilegesunauthenticated

What is affected?

XnSoft · XnView Classicversion=before 2.13

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002Malicious File

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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