What is CVE-2019-17663?

CVE-2019-17663 is a medium-severity vulnerability in D-Link Dir-866l Firmware, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-10-16.

How severe is CVE-2019-17663?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in D-Link Dir-866l Firmware

CVE-2019-17663

D-Link DIR-866L 1.03B04 devices allow XSS via HtmlResponseMessage in the device common gateway interface, leading to common injection.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-10-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (61.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

D-Link Dir-866l Firmware — versions 1.03b04
Dlink Dir-866l

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

fortiguard.com/zeroday/FG-VD-19-116 (Third Party Advisory)

Frequently asked questions

What is CVE-2019-17663?: CVE-2019-17663 is a medium-severity vulnerability in D-Link Dir-866l Firmware, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-10-16.
How severe is CVE-2019-17663?: Medium severity. CVSS v3 base score is 6.1 out of 10.