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TI-2020-14160 Aliases CVE-2020-21733GHSA-jq52-3fww-m362

Sagemcom F@ST3686 v1.0 HUN 3.97.0 has XSS via RgDiagnostics.asp, RgDdns.asp, RgFirewallEL.asp, RgVpnL2tpPptp.asp.

Priority LOW 29CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

Sagemcom F@ST3686 v1.0 HUN 3.97.0 has XSS via RgDiagnostics.asp, RgDdns.asp, RgFirewallEL.asp, RgVpnL2tpPptp.asp.

Why it matters now

EPSS 0.0073 54th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:sagemcom:f\@st_3686_firmware:1.0_hun_3.97.0:*:*:*:*:*:*:*1.0_hun_3.97.0VulnerableSagemcom
cpe:2.3:h:sagemcom:f\@st_3686:-:*:*:*:*:*:*:*not specified by NVDRunning onSagemcom
  • cpe:2.3:o:sagemcom:f\@st_3686_firmware:1.0_hun_3.97.0:*:*:*:*:*:*:* Versions 1.0_hun_3.97.0 Vulnerable ·Sagemcom
  • cpe:2.3:h:sagemcom:f\@st_3686:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Sagemcom

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-21733
  2. 2026-10-03 Alias added: GHSA-jq52-3fww-m362

References

Exploit 2

  • TI-2019-14043 Broadcom based cable modems across multiple vendors are vulnerable to a buffer overflow… CVSS 3.1HIGH 8.8
  • TI-2025-21043 Buffer Overflow in the ippprint (Internet Printing Protocol) service in Sagemcom F@st… CVSS 3.1CRITICAL 9.8
  • TI-2021-02310 Sagemcom F@ST 3686 v2 3.495 devices have a buffer overflow via a long sessionKey to the goform/login URI. CVSS 3.1CRITICAL 9.8
  • TI-2024-01507 Insufficient session timeout vulnerability in Sagemcom router CVSS 3.1HIGH 7.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences