CVE-2026-36355 Missing authorization in n/a
Attackers can read or modify kernel memory via unauthenticated debug ioctls in the Realtek rtl8192cd Wi-Fi driver.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-36355?
CVE-2026-36355 is a high-severity missing authorization vulnerability in n/a, published on 5 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The rtl8192cd Wi-Fi kernel driver in the Realtek rtl819x Jungle SDK (all known versions through v3.4.14B) does not perform any access control checks on the write_mem (ioctl 0x89F5) and read_mem (ioctl 0x89F6) debug handlers, which are compiled into production builds via the unconditionally defined _IOCTL_DEBUG_CMD_ macro in 8192cd_cfg.h
Which versions are affected by CVE-2026-36355?
How do I fix CVE-2026-36355?
No fix has been published for CVE-2026-36355 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-36355 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-36355 exists.
Public exploit code: 1 Exploit-DB entry and 1 proofs of concept on GitHub.
Sources
Also known as GHSA-j39q-3p58-f4c8.