What’s Vulnerable › Vulnerabilities
CVE-2023-39943: Ashlar-Vellum Cobalt, Xenon, Argon, Lithium Out-of-bounds Write
- Severity: high (CVSS 7.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-02-04 · updated 2026-06-17
- Weakness: CWE-787
Description
In Ashlar-Vellum Cobalt versions prior to v12 SP2 Build (1204.200), the affected application lacks 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.
Affected products
- Ashlar-Vellum Cobalt: before 12.4.1204.200 — fixed in 12.4.1204.200
How to fix
Upgrade to a fixed version: Ashlar-Vellum Cobalt 12.4.1204.200. Check the vendor advisory for mitigations.
References
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