What is CVE-2017-16563?

CVE-2017-16563 is a high-severity vulnerability in Grandstream Ht802, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.0/10. Published 2017-11-06.

How severe is CVE-2017-16563?

High severity. CVSS v3 base score is 8.0 out of 10.

CSRF in Grandstream Ht802

CVE-2017-16563

Cross-Site Request Forgery (CSRF) in the Basic Settings screen on Vonage (Grandstream) HT802 devices allows attackers to modify settings, related to cgi-bin/update.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2017-11-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (35.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

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

Frequently asked questions

What is CVE-2017-16563?: CVE-2017-16563 is a high-severity vulnerability in Grandstream Ht802, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.0/10. Published 2017-11-06.
How severe is CVE-2017-16563?: High severity. CVSS v3 base score is 8.0 out of 10.