What is CVE-2022-40103?

CVE-2022-40103 is a medium-severity vulnerability in Tenda I9, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2022-09-23.

How severe is CVE-2022-40103?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2022-40103 known to be exploited?

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

Buffer overflow in Tenda I9

CVE-2022-40103

Tenda i9 v1.0.0.8(3828) was discovered to contain a buffer overflow via the formSetAutoPing function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted string.

Vulnerability class: Buffer Overflow

Published 2022-09-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (14.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 14.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

Tenda I9
Tenda I9 Firmware — versions 1.0.0.8(3828), 1.0.0.8\(3828\)

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

splashsc/IOT_

References

github.com/splashsc/IOT_Vulnerability_Discovery/blob/main/Tenda/Tenda_i9/buffer… (Third Party Advisory, Broken Link)

Frequently asked questions

What is CVE-2022-40103?: CVE-2022-40103 is a medium-severity vulnerability in Tenda I9, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2022-09-23.
How severe is CVE-2022-40103?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2022-40103 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.