CVE-2025-7985: Ashlar-Vellum Cobalt · Integer Overflow or Wraparound
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 10% 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
1. Immediate mitigation should focus on user awareness and training to avoid opening untrusted VC6 files or visiting suspicious links. 2. Implement strict email and web filtering to block malicious attachments and URLs that could deliver exploit payloads. 3. Employ application whitelisting and sandboxing techniques to restrict the execution context of Ashlar-Vellum Cobalt, limiting the impact of potential exploitation. 4. Monitor network and endpoint logs for unusual behavior indicative of exploitation attempts, such as unexpected process launches or memory anomalies. 5. Coordinate with Ashlar-Vellum for timely patch deployment once available; in the meantime, consider disabling VC6 file support if feasible or restricting file types accepted by the application. 6. Use endpoint detection and response (EDR) tools to detect and respond to exploitation attempts rapidly. 7. Maintain regular backups and ensure recovery plans are tested to mitigate the impact of potential ransomware or destructive payloads delivered via this vulnerability.
Description
Ashlar-Vellum Cobalt VC6 File Parsing Integer Overflow 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 VC6 files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25704.