CVE-2025-8002

Code execution via CO file type confusion

Published Sep 17, 2025 · Updated Sep 17, 2025

Type confusion in the CO file parser in Ashlar-Vellum Cobalt 12 SP1 allows attackers to execute code via a crafted CO file. The parser fails to validate user-supplied CO data before using it as the expected type, causing an incompatible interpretation of the file. Exploitation requires a user to visit a malicious page or open the file, after which code runs in the context of the Cobalt process.

CVSS severity7.8
High
EPSS probability0.21%
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

Type confusion in the CO file parser in Ashlar-Vellum Cobalt 12 SP1 allows attackers to execute code via a crafted CO file. The parser fails to validate user-supplied CO data before using it as the expected type, causing an incompatible interpretation of the file. Exploitation requires a user to visit a malicious page or open the file, after which code runs in the context of the Cobalt process.

The record

CVE
CVE-2025-8002
Published
Sep 17, 2025
Updated
Sep 17, 2025
Vendor
Ashlar-Vellum
Product
Cobalt
Classifications
CWE-843, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2025Record 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=12 SP1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Ashlar-Vellum · Cobaltversion=12 SP1

Published CVSS scores

7.8Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:N/UI:R/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
T1204.002Malicious File
T1203Exploitation for Client Execution

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