CVE-2023-39936

Code execution via unchecked VC6 file parsing

Published Oct 26, 2023 · Updated Sep 9, 2024

Out-of-bounds read in Ashlar-Vellum Graphite 13.0.48 allows attackers to execute code by opening a crafted VC6 file. The VC6 parser reads beyond the end of attacker-controlled file data because it fails to validate that data before access. A user must open the file in Graphite; resulting code runs with the privileges of the current process.

CVSS severity7.8
High
EPSS probability0.26%
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 Ashlar-Vellum Graphite 13.0.48 allows attackers to execute code by opening a crafted VC6 file. The VC6 parser reads beyond the end of attacker-controlled file data because it fails to validate that data before access. A user must open the file in Graphite; resulting code runs with the privileges of the current process.

The record

CVE
CVE-2023-39936
Published
Oct 26, 2023
Updated
Sep 9, 2024
Vendor
Ashlar-Vellum
Product
Graphite
Classifications
CWE-125, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 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=v13.0.48

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Ashlar-Vellum · Graphiteversion=v13.0.48

Published CVSS scores

7.8ICS-CERTCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1204.002User Execution: Malicious 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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