CVE-2026-4840 Netcore Power 15AX Diagnostic Tool netis.cgi setTools os command injection
Remote attackers can execute arbitrary OS commands via the Diagnostic Tool interface due to improper input validation in the setTools function.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4840?
CVE-2026-4840 is a high-severity command injection vulnerability in Netcore Power 15AX, published on 26 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security flaw has been discovered in Netcore Power 15AX up to 3.0.0.6938. Affected by this issue is the function setTools of the file /bin/netis.cgi of the component Diagnostic Tool Interface. Performing a manipulation of the argument IpAddr results in os command injection. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-4840?
How do I fix CVE-2026-4840?
No fix has been published for CVE-2026-4840 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-4840 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4840 exists.
Sources
Also known as GHSA-6m7m-cxf3-4phv.