Vulnerability · Published Aug 18, 2025 · Assigned by icscert
CVE-2025-46269Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share Heap-based Buffer Overflow
High 7.8
In plain English
A high-severity heap buffer overflow in Argon from Ashlar-Vellum. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 94.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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 VC6 files. This could lead to a heap-based buffer overflow. An attacker could leverage this vulnerability to execute arbitrary code in the context of the current process.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Ashlar-Vellum | Cobalt | 0 – before 12.6.1204.204 |
| Ashlar-Vellum | Xenon | 0 – before 12.6.1204.204 |
| Ashlar-Vellum | Argon | 0 – before 12.6.1204.204 |
| Ashlar-Vellum | Lithium | 0 – before 12.6.1204.204 |
| Ashlar-Vellum | Cobalt Share | 0 – before 12.6.1204.204 |
Weakness: CWE-122 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H