CVE-2026-112158 MikroTik RouterOS ipt_SAME.ko same_check integer overflow
A remote attacker can trigger an integer overflow in the ipt_SAME.ko module, potentially causing a denial of service on MikroTik RouterOS devices.
- 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-2026-112158?
CVE-2026-112158 is a high-severity vulnerability in MikroTik RouterOS, published on 19 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A weakness has been identified in MikroTik RouterOS up to 6.40.5/6.44/7.20.8. Impacted is the function same_check of the file ipt_SAME.ko. Executing a manipulation can lead to integer overflow. The attack may be launched remotely. Upgrading to version 7.21.5 and 7.23.1 is recommended to address this issue. You should upgrade the affected component.
Which versions are affected by CVE-2026-112158?
How do I fix CVE-2026-112158?
No fix has been published for CVE-2026-112158 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-112158 being exploited?
There is no known exploitation of CVE-2026-112158 in the wild and no public exploit code.
Sources
Also known as GHSA-99hw-pp85-5wcr.