Buffer overflow in Netcore Nr255-V
CVE-2026-76861
Netcore NR255-V version 1.5.130703 contains a stack-based buffer overflow in ntools_tcpdump_start_set.cgi caused by an unsized sprintf call when processing form values. An attacker can submit crafted input to this cgi endpoint to overflow the stack buffer and potentially execute arbitrary code.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Netcore Nr255-v — versions 1.5.130703
Weakness classification (CWE)
References
- disclosure@vulncheck.com (third-party-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-76861?
- CVE-2026-76861 is a high-severity vulnerability in Netcore Nr255-V, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-09-15.
- How severe is CVE-2026-76861?
- High severity. CVSS v3 base score is 8.8 out of 10.