CVE-2025-7984: Ashlar-Vellum Cobalt · Use of Uninitialized Variable
Affects Ashlar-Vellum CobaltSource CVE Database V5
Not known to be exploited · CVSS 7.8 High.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 17 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Ashlar-Vellum Cobalt | Affected
| Fixed in– |
AI-suggested
European organizations should implement targeted mitigation strategies beyond generic advice: 1) Restrict the use of Ashlar-Vellum Cobalt to trusted users and environments, minimizing exposure to untrusted files. 2) Implement strict file validation and sandboxing for AR files before opening them in Cobalt to detect and block malformed or suspicious files. 3) Educate users on the risks of opening files from untrusted sources and enforce policies against opening unsolicited AR files. 4) Monitor network and endpoint activity for anomalous behavior indicative of exploitation attempts, such as unexpected process execution or memory anomalies related to Cobalt. 5) Employ application whitelisting and privilege restrictions to limit the impact of potential code execution within Cobalt. 6) Coordinate with Ashlar-Vellum for timely patch deployment once available and test patches in controlled environments before widespread rollout. 7) Use endpoint detection and response (EDR) tools to detect exploitation attempts and contain incidents rapidly. 8) Consider network segmentation to isolate systems running Cobalt from critical infrastructure to reduce lateral movement risk.
Description
Ashlar-Vellum Cobalt AR File Parsing Uninitialized Variable Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of AR files. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25700.