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TI-2025-40239 Aliases CVE-2025-65086GHSA-c3x5-fm9m-c4fc

Out-of-bounds write in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share

Priority LOW 38CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

An Out-of-Bounds Write vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share versions 12.6.1204.216 and prior that could allow an attacker to execute arbitrary code when a specially crafted VC6 file is being parsed.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00165 5th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Ashlar-VellumCobaltup to 12.6.1204.216—No fix listedCNA
Ashlar-VellumXenonup to 12.6.1204.216—No fix listedCNA
Ashlar-VellumArgonup to 12.6.1204.216—No fix listedCNA
Ashlar-VellumLithiumup to 12.6.1204.216—No fix listedCNA
Ashlar-VellumCobalt Shareup to 12.6.1204.216—No fix listedCNA
  • Cobalt VendorAshlar-Vellum Affected up to 12.6.1204.216 Fixed in — No fix listed CNA
  • Xenon VendorAshlar-Vellum Affected up to 12.6.1204.216 Fixed in — No fix listed CNA
  • Argon VendorAshlar-Vellum Affected up to 12.6.1204.216 Fixed in — No fix listed CNA
  • Lithium VendorAshlar-Vellum Affected up to 12.6.1204.216 Fixed in — No fix listed CNA
  • Cobalt Share VendorAshlar-Vellum Affected up to 12.6.1204.216 Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:ashlar:argon:*:*:*:*:*:*:*:*up to 12.6.1204.216VulnerableAshlar-Vellum
cpe:2.3:a:ashlar:cobalt:*:*:*:*:*:*:*:*up to 12.6.1204.216VulnerableAshlar-Vellum
cpe:2.3:a:ashlar:cobalt_share:*:*:*:*:*:*:*:*up to 12.6.1204.216VulnerableAshlar-Vellum
cpe:2.3:a:ashlar:lithium:*:*:*:*:*:*:*:*up to 12.6.1204.216VulnerableAshlar-Vellum
cpe:2.3:a:ashlar:xenon:*:*:*:*:*:*:*:*up to 12.6.1204.216VulnerableAshlar-Vellum
  • cpe:2.3:a:ashlar:argon:*:*:*:*:*:*:*:* Versions up to 12.6.1204.216 Vulnerable ·Ashlar-Vellum
  • cpe:2.3:a:ashlar:cobalt:*:*:*:*:*:*:*:* Versions up to 12.6.1204.216 Vulnerable ·Ashlar-Vellum
  • cpe:2.3:a:ashlar:cobalt_share:*:*:*:*:*:*:*:* Versions up to 12.6.1204.216 Vulnerable ·Ashlar-Vellum
  • cpe:2.3:a:ashlar:lithium:*:*:*:*:*:*:*:* Versions up to 12.6.1204.216 Vulnerable ·Ashlar-Vellum
  • cpe:2.3:a:ashlar:xenon:*:*:*:*:*:*:*:* Versions up to 12.6.1204.216 Vulnerable ·Ashlar-Vellum

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-65086
  2. 2026-10-03 Alias added: GHSA-c3x5-fm9m-c4fc

References

Advisory 1

  • TI-2023-23944 Uncontrolled search path in Ashlar-Vellum Argon CVSS 3.1HIGH 8.8
  • TI-2025-40238 Heap-based Buffer Overflow in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share CVSS 4.0HIGH 8.4
  • TI-2025-40241 Out-of-bounds read in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share CVSS 4.0HIGH 8.4
  • TI-2025-40240 Out-of-bounds read in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share CVSS 4.0HIGH 8.4
  • TI-2025-40237 Out-of-bounds Write in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share CVSS 4.0HIGH 8.4
  • TI-2025-33618 Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share Out-of-bounds Write CVSS 4.0HIGH 8.4
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences