CVE-2025-65085

Code execution via heap buffer overwrite

Published Nov 25, 2025 · Updated May 12, 2026

Heap overflow in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share 12.6.1204.216 and earlier allows attackers to execute code. CISA has not disclosed the input format, affected parser, or length or copy operation that overwrites the heap buffer. Exploitation requires local delivery and active user interaction and can disclose information or run arbitrary code in the application's context.

CVSS severity8.4
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Heap overflow in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share 12.6.1204.216 and earlier allows attackers to execute code. CISA has not disclosed the input format, affected parser, or length or copy operation that overwrites the heap buffer. Exploitation requires local delivery and active user interaction and can disclose information or run arbitrary code in the application's context.

The record

CVE
CVE-2025-65085
Published
Nov 25, 2025
Updated
May 12, 2026
Vendor
Ashlar-Vellum
Product
Cobalt
Classifications
CWE-122
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 25, 2025CVE publishedPublication date reported by the CVE source.
  2. May 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=12.6.1204.216

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Ashlar-Vellum · Cobaltversion=0 <=12.6.1204.216
Ashlar-Vellum · Cobalt Shareversion=0 <=12.6.1204.216
Ashlar-Vellum · Xenonversion=0 <=12.6.1204.216
Ashlar-Vellum · Argonversion=0 <=12.6.1204.216
Ashlar-Vellum · Lithium CADversion=0 <=12.6.1204.216

Published CVSS scores

8.4ICS-CERTCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo