What is CVE-2022-40740?

CVE-2022-40740 is a high-severity vulnerability in Realtek Gpon Router, classified under OS Command Injection. CVSS score: 7.2/10. Published 2023-01-03.

How severe is CVE-2022-40740?

High severity. CVSS v3 base score is 7.2 out of 10.

RCE in Realtek Gpon Router

CVE-2022-40740

Realtek GPON router has insufficient filtering for special characters. A remote attacker authenticated as an administrator can exploit this vulnerability to perform command injection attacks, to execute arbitrary system command, manipulate system or disrupt service.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.015 (71.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Realtek Gpon Router — versions SDK 1.9
Realtek Usdk — versions 1.0, 2.0, 2.2
Realtek Xpon_software_development_kit — versions 1.9, 3.3, 4.0

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

twcert@cert.org.tw (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2022-40740?: CVE-2022-40740 is a high-severity vulnerability in Realtek Gpon Router, classified under OS Command Injection. CVSS score: 7.2/10. Published 2023-01-03.
How severe is CVE-2022-40740?: High severity. CVSS v3 base score is 7.2 out of 10.