CVE-2025-7978: Ashlar-Vellum Graphite · Use of Uninitialized Variable
Affects Ashlar-Vellum GraphiteSource CVE Database V5
Not known to be exploited · CVSS 7.8 High.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 14% 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 26 Oct 2026.
What to do
AI-suggested
European organizations should implement several targeted mitigation strategies: 1) Immediately audit and identify all installations of Ashlar-Vellum Graphite version 13_SE_13048 within their environment. 2) Restrict or disable the opening of VC6 files from untrusted or unknown sources until a patch is available. 3) Employ application whitelisting and sandboxing techniques to limit the execution context of Graphite, reducing the impact of potential exploitation. 4) Enhance user awareness training focused on recognizing phishing attempts and suspicious files, given the requirement for user interaction. 5) Monitor network and endpoint logs for unusual activity related to Graphite processes, including unexpected file accesses or process behaviors. 6) Engage with Ashlar-Vellum for updates or patches and apply them promptly once released. 7) Consider network segmentation to isolate systems running Graphite from critical infrastructure to limit lateral movement. 8) Utilize endpoint detection and response (EDR) tools to detect exploitation attempts or anomalous behaviors linked to this vulnerability.
Description
Ashlar-Vellum Graphite VC6 File Parsing Uninitialized Variable Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Graphite. 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 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-25459.