CVE-2025-53705: Ashlar Argon

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Ashlar Argon: before 12.2.1204.204 (fixed in 12.2.1204.204)
• Ashlar Cobalt: before 12.2.1204.204 (fixed in 12.2.1204.204)
• Ashlar Cobalt Share: before 12.2.1204.204 (fixed in 12.2.1204.204)
• Ashlar Lithium: before 12.2.1204.204 (fixed in 12.2.1204.204)
• Ashlar Xenon: before 12.2.1204.204 (fixed in 12.2.1204.204)

Published 2025-08-18. Last modified 2026-06-17.