What is CVE-2025-7998?

CVE-2025-7998 is a high-severity vulnerability in Ashlar-vellum Cobalt, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2025-09-17.

How severe is CVE-2025-7998?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Ashlar-vellum Cobalt

CVE-2025-7998

Ashlar-Vellum Cobalt CO File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. User interaction is requi…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (15.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Ashlar-vellum Cobalt — versions 12 SP1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

ZDI-25-715 (x_research-advisory)

Frequently asked questions

What is CVE-2025-7998?: CVE-2025-7998 is a high-severity vulnerability in Ashlar-vellum Cobalt, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2025-09-17.
How severe is CVE-2025-7998?: High severity. CVSS v3 base score is 7.8 out of 10.