What is CVE-2021-43474?

CVE-2021-43474 is a critical-severity vulnerability in Dlink Dir-823g, classified under Command Injection. CVSS score: 9.8/10. Published 2022-04-07.

How severe is CVE-2021-43474?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Dlink Dir-823g

CVE-2021-43474

An Access Control vulnerability exists in D-Link DIR-823G REVA1 1.02B05 (Lastest) via any parameter in the HNAP1 function

Vulnerability class: Command Injection (OS Command Injection)

Published 2022-04-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.031 (87.8th percentile), scored 2026-10-31.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000

Affected products

Dlink Dir-823g
Dlink Dir-823g Firmware — versions 1.02b05

Weakness classification (CWE)

CWE-77 — Command Injection

References

www.dlink.com/en/security-bulletin/ (Vendor Advisory)
github.com/sek1th/iot/blob/master/dir-823g_all.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-43474?: CVE-2021-43474 is a critical-severity vulnerability in Dlink Dir-823g, classified under Command Injection. CVSS score: 9.8/10. Published 2022-04-07.
How severe is CVE-2021-43474?: Critical severity. CVSS v3 base score is 9.8 out of 10.