What is CVE-2022-21809?

CVE-2022-21809 is a high-severity vulnerability in Inhand Networks Inrouter302, classified under Insecure Temporary File. CVSS score: 8.1/10. Published 2022-05-12.

How severe is CVE-2022-21809?

High severity. CVSS v3 base score is 8.1 out of 10.

Arbitrary file upload in Inhand Networks Inrouter302

CVE-2022-21809

A file write vulnerability exists in the httpd upload.cgi functionality of InHand Networks InRouter302 V3.5.4. A specially-crafted HTTP request can lead to arbitrary file upload. An attacker can upload a malicious file to trigger this vulnerability.

Published 2022-05-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.018 (77.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Inhand Networks Inrouter302 — versions V3.5.4
Inhandnetworks Inrouter302
Inhandnetworks Inrouter302 Firmware

Weakness classification (CWE)

References

www.inhandnetworks.com/upload/attachment/202205/10/InHand-PSA-2022-01.pdf (Vendor Advisory)
talosintelligence.com/vulnerability_reports/TALOS-2022-1468 (Technical Description, Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-21809?: CVE-2022-21809 is a high-severity vulnerability in Inhand Networks Inrouter302, classified under Insecure Temporary File. CVSS score: 8.1/10. Published 2022-05-12.
How severe is CVE-2022-21809?: High severity. CVSS v3 base score is 8.1 out of 10.