CVE-2023-46587Public exploit

Code execution via out-of-bounds TIF parsing write

Published Oct 27, 2023 · Updated Sep 12, 2024

Buffer overflow in TIF parsing in XnView Classic 2.51.5 allows local users to execute arbitrary code through a crafted image file. Opening the file triggers a user-mode write access violation at xnview+0x35d52d because the parser writes beyond the intended memory boundary. Exploitation requires the crafted TIF file to be opened, after which the process can crash or attacker-supplied code can run in the user context.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in TIF parsing in XnView Classic 2.51.5 allows local users to execute arbitrary code through a crafted image file. Opening the file triggers a user-mode write access violation at xnview+0x35d52d because the parser writes beyond the intended memory boundary. Exploitation requires the crafted TIF file to be opened, after which the process can crash or attacker-supplied code can run in the user context.

The record

CVE
CVE-2023-46587
Published
Oct 27, 2023
Updated
Sep 12, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 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 vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDCVSS:3.1/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1203Exploitation for Client Execution
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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