CVE-2017-20224Public exploitNetwork attack vector

Unauthenticated code execution via unrestricted WebDAV PUT

Published Mar 16, 2026 · Updated Mar 16, 2026

Arbitrary file upload in Telesquare SDT-CS3B1 1.2.0 allows remote attackers to execute code through unauthenticated WebDAV requests. Its lighttpd WebDAV service accepts PUT to a user-supplied URL without authentication or file-type restrictions and exposes destructive methods. Network access to the router's HTTP service is sufficient; server-executable uploads enable code execution, while DELETE, MOVE, and related methods can alter files or interrupt service.

CVSS severity9.3
Critical
EPSS probability1.04%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Arbitrary file upload in Telesquare SDT-CS3B1 1.2.0 allows remote attackers to execute code through unauthenticated WebDAV requests. Its lighttpd WebDAV service accepts PUT to a user-supplied URL without authentication or file-type restrictions and exposes destructive methods. Network access to the router's HTTP service is sufficient; server-executable uploads enable code execution, while DELETE, MOVE, and related methods can alter files or interrupt service.

The record

CVE
CVE-2017-20224
Published
Mar 16, 2026
Updated
Mar 16, 2026
Vendor
Telesquare
Product
SDT-CS3B1
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Telesquare · SDT-CS3B1version=1.2.0

Published CVSS scores

9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo