What is CVE-2017-16564?

CVE-2017-16564 is a medium-severity vulnerability in Grandstream Ht802, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2017-11-06.

How severe is CVE-2017-16564?

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

XSS in Grandstream Ht802

CVE-2017-16564

Stored Cross-site scripting (XSS) vulnerability in /cgi-bin/config2 on Vonage (Grandstream) HT802 devices allows remote authenticated users to inject arbitrary web script or HTML via the DHCP vendor class ID field (P148).

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-11-06 · 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 (47.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.3% 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

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

distributedcompute.com/2017/11/04/vonage-ht802-multiple-vulnerabilities/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2017-16564?: CVE-2017-16564 is a medium-severity vulnerability in Grandstream Ht802, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2017-11-06.
How severe is CVE-2017-16564?: Medium severity. CVSS v3 base score is 5.4 out of 10.