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Fencer Vulns
high 7.8

CVE-2025-53705 json

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

published 2025-08-18 14 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-25169

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 7%
public exploits
0
none known

Summary

In Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share versions prior to 12.6.1204.204, the affected applications lack proper validation of user-supplied data when parsing CO 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-Vellum Cobalt 12.6.1204.204
  • Ashlar-Vellum Xenon 12.6.1204.204
  • Ashlar-Vellum Argon 12.6.1204.204
  • Ashlar-Vellum Lithium 12.6.1204.204
  • Ashlar-Vellum Cobalt Share 12.6.1204.204

Vendor advisories

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

cisa ICSA-25-224-01 updated cvss 7.8

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

  • Ashlar-Vellum Argon <12.6.1204.204 Ashlar-Vellum Cobalt <12.6.1204.204 Ashlar-Vellum Cobalt Share <12.6.1204.204 Ashlar-Vellum Lithium <12.6.1204.204 Ashlar-Vellum Xenon <12.6.1204.204
    affected: vendor fix, mitigation “Ashlar-Vellum recommends users update to Versions 12.6.1204.204 and above of the affected products.” 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
14 mo ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 8.4 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 4.0 8.4 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.