Cyber Resilience

CVE-2025-65086

High

Published: 12 May 2026

Published
12 May 2026
Modified
14 May 2026
KEV Added
—
Patch
—
CVSS Score v4 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
EPSS Score 0.0016 6.1th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2025-65086 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Ashlar Argon. Its CVSS base score is 8.4 (High).

Operationally, ranked at the 6.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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.

CWE(s)
CWE-787

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

ashlar
argon
≤ 12.6.1204.216
ashlar
cobalt
≤ 12.6.1204.216
ashlar
cobalt share
≤ 12.6.1204.216
ashlar
lithium
≤ 12.6.1204.216
ashlar
xenon
≤ 12.6.1204.216

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

References