What is CVE-2018-20373?

CVE-2018-20373 is a medium-severity vulnerability in Tendacn Adsl, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-12-23.

How severe is CVE-2018-20373?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Tendacn Adsl

CVE-2018-20373

Tenda ADSL modem routers 1.0.1 allow XSS via the hostname of a DHCP client.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-12-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.2th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Tendacn Adsl
Tendacn Adsl Firmware — versions 1.0.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.vulnerability-lab.com/get_content.php (Exploit, Third Party Advisory)
www.youtube.com/watch (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-20373?: CVE-2018-20373 is a medium-severity vulnerability in Tendacn Adsl, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-12-23.
How severe is CVE-2018-20373?: Medium severity. CVSS v3 base score is 5.4 out of 10.