How severe is CVE-2019-17663?

CVE-2019-17663 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2019-17663 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-17663?

CVE-2019-17663 affects D-link Dir-866l Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-17663?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-17663 published?

CVE-2019-17663 was published on 2019-10-16 and last updated on 2026-06-17.

CVE-2019-17663

CVE-2019-17663 is a medium-severity vulnerability in D-link Dir-866l Firmware with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: D-link Dir-866l Firmware
Published: 2019-10-16
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2019-17663?: D-Link DIR-866L 1.03B04 devices allow XSS via HtmlResponseMessage in the device common gateway interface, leading to common injection.
How severe is CVE-2019-17663?: CVE-2019-17663 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2019-17663 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-17663?: CVE-2019-17663 affects D-link Dir-866l Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-17663?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-17663 published?: CVE-2019-17663 was published on 2019-10-16 and last updated on 2026-06-17.

References

https://fortiguard.com/zeroday/FG-VD-19-116

Affected products (1)

cpe:2.3:o:d-link:dir-866l_firmware:1.03b04:*:*:*:*:*:*:*

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