The rtl8192cd Wi-Fi kernel driver in the Realtek rtl819x Jungle SDK (all known versions through v3.4.14B) does not perform any access contr…

published 2026-05-05 6 mo ago modified 2026-07-05 4 mo ago also EUVD-2026-27325

cvss: 7.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits: 1; Exploit-DB

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

Timeline

2026-05-05 Published
2026-05-27 First public exploit (EDB-52580)

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 6 mo ago (2026-05-05)

Exploit prediction

0.67% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-52580 Realtek rtl819x - Local Privilege local, 2026-05-27
github.com https://github.com/totekuh/CVE-2026-36355 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.7	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CNA	3.1	7.7	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Classification

Weakness

CWE-782 Exposed IOCTL with Insufficient Access Control
CWE-787 Out-of-bounds Write
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

github.com /totekuh/CVE-2026-36355
exploit

Sources

CVE List CVE-2026-36355
NVD CVE-2026-36355

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary