What is CVE-2022-30477?

CVE-2022-30477 is a critical-severity vulnerability in Tenda Ac18, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-05-26.

How severe is CVE-2022-30477?

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

Is CVE-2022-30477 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Tenda Ac18

CVE-2022-30477

Tenda AC Series Router AC18_V15.03.05.19(6318) was discovered to contain a stack-based buffer overflow in the httpd module when handling /goform/SetClientState request.

Vulnerability class: Buffer Overflow

Published 2022-05-26 · 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: 0.014 (71.2th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Tenda Ac18
Tenda Ac18 Firmware — versions 15.03.05.19\(6318\), 15.03.05.19(6318)

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

github.com/lcyfrank/VulnRepo/tree/master/IoT/Tenda/4 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-30477?: CVE-2022-30477 is a critical-severity vulnerability in Tenda Ac18, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-05-26.
How severe is CVE-2022-30477?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2022-30477 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.