Netcore NR255-V CVE-2026-76869

Q: What is the CVSS score of CVE-2026-76869?

CVE-2026-76869 has a CVSS 4.0 base score of 8.6 (High). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.4%.

EUVD-2026-80041 HIGH

Stack-based Buffer Overflow (CWE-121)

2026-09-15 disclosure@vulncheck.com

GHSA-pm8m-93fr-93q6

Buffer Overflow Stack Overflow

8.6

CVSS 4.0 · Vendor: vulncheck

Severity by source

Vendor (vulncheck) PRIMARY

8.6 HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from Vendor (vulncheck) · only source for this CVE.

CVSS VectorVendor: vulncheck

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Sep 15, 2026 - 22:32 vuln.today

CVE Published

Sep 15, 2026 - 22:17 cve.org

HIGH 8.6

DescriptionCVE.org

Netcore NR255-V version 1.5.130703 contains a stack-based buffer overflow in reboot_timer_set.cgi caused by improper sscanf token parsing. Attackers can exploit this flaw by submitting crafted input to the affected endpoint to corrupt stack memory.

AnalysisAI

Netcore NR255-V firmware 1.5.130703 ships a stack-based buffer overflow in the reboot_timer_set.cgi web endpoint, reachable through the router's HTTP management interface. The flaw stems from improper sscanf token parsing of user-supplied input, allowing a user who already holds administrative credentials on the device to corrupt stack memory and potentially execute code in the router's firmware context or crash/reboot it. …