CVE-2017-16565 — Cross-Site Request Forgery (CSRF) in /cgi-bin/login on Vonage (Grandstream) HT80

Cross-Site Request Forgery (CSRF) in /cgi-bin/login on Vonage (Grandstream) HT802 devices allows attackers to authenticate a user via the login screen using the default password of 123 and submit arbitrary requests.

01What is this vulnerability?

Cross-Site Request Forgery (CSRF) in /cgi-bin/login on Vonage (Grandstream) HT802 devices allows attackers to authenticate a user via the login screen using the default password of 123 and submit arbitrary requests.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2017-11-06T08:29:00.313
• Last modified: 2026-05-13T00:24:29.033

09References

• distributedcompute.com — https://distributedcompute.com/2017/11/04/vonage-ht802-multiple-vulnerabilities/
• distributedcompute.com — https://distributedcompute.com/2017/11/04/vonage-ht802-multiple-vulnerabilities/