CVE-2026-76869 Netcore NR255-V 1.5.130703 Stack-Based Buffer Overflow in reboot_timer_set.cgi
Attackers can exploit a stack-based buffer overflow in the reboot timer CGI to corrupt memory, potentially leading to code execution or denial of service on Netcore NR255-V routers.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76869?
CVE-2026-76869 is a high-severity memory corruption vulnerability in Netcore NR255-V, published on 15 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-121
Which versions are affected by CVE-2026-76869?
How do I fix CVE-2026-76869?
No fix has been published for CVE-2026-76869 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-76869 being exploited?
There is no known exploitation of CVE-2026-76869 in the wild and no public exploit code.
Sources
Also known as GHSA-pm8m-93fr-93q6.