Stack-Based Buffer Overflow in Netcore NR255-V Router
CVE-2026-76869

8.6HIGH

Key Information:

Vendor

Netcore

Status
Nr255-v
Vendor
CVE Published:
15 September 2026

What is CVE-2026-76869?

The Netcore NR255-V router, specifically version 1.5.130703, is susceptible to a stack-based buffer overflow due to inadequate parsing of input tokens in the reboot_timer_set.cgi file. Attackers can exploit this vulnerability by sending specially crafted inputs to the affected CGI endpoint, potentially leading to unintended memory corruption and possibly allowing for remote code execution.

Affected Version(s)

NR255-V 1.5.130703

References

https://github.com/draw-ctf/netcore-router-public-refs/bl...
third-party-advisory
https://www.vulncheck.com/advisories/netcore-nr255-v-1.5....
third-party-advisory

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Zhou Ao
Yin Luxing
Jiang Yuxuan
Liu Xin
@Nebusec
.