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Fencer Vulns
high 7.8

CVE-2023-39427 json

Ashlar-Vellum Cobalt, Xenon, Argon, Lithium Out-of-bounds Write

published 2023-10-26 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-43151

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

Summary

In Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share v12 SP0 Build (1204.77), the affected applications lack proper validation of user-supplied data when parsing XE files. This could lead to an out-of-bounds write. An attacker could leverage this vulnerability to execute arbitrary code in the context of the current process.

Patch / fix

  • ashlar cobalt 12.4.1204.200
  • ashlar xenon 12.4.1204.200
  • ashlar argon 12.4.1204.200
  • ashlar lithium 12.4.1204.200

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-23-299-03 updated cvss 7.8

Ashlar-Vellum Cobalt, Graphite, Xenon, Argon, Lithium (Update A)

  • Ashlar-Vellum Argon <v12_SP2_Build_1204.200 Ashlar-Vellum Cobalt <v12_SP2_Build_1204.200
    affected: vendor fix, mitigation “Ashlar-Vellum recommends users apply the following mitigations to help reduce risk:” download.ashlar.com
  • Ashlar-Vellum Cobalt Share <v12_SP2_Build_1204.200
    affected: mitigation “Ashlar-Vellum recommends users apply the following mitigations to help reduce risk:”
  • Ashlar-Vellum Graphite <=v13.0.48
    affected: vendor fix, mitigation “Ashlar-Vellum recommends users apply the following mitigations to help reduce risk:” download.ashlar.com
  • Ashlar-Vellum Lithium <v12_SP2_Build_1204.200 Ashlar-Vellum Xenon <v12_SP2_Build_1204.200
    affected: vendor fix, mitigation “Ashlar-Vellum recommends users apply the following mitigations to help reduce risk:” download.ashlar.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
21 mo ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Ashlar-Vellum Cobalt
  • Ashlar-Vellum Xenon
  • Ashlar-Vellum Argon
  • Ashlar-Vellum Lithium
  • Ashlar-Vellum Cobalt Share

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.