CVE-2017-20221Public exploitNetwork attack vector

System command execution via missing CSRF validation

Published Mar 16, 2026 · Updated Mar 16, 2026

Cross-site request forgery in Telesquare SDT-CS3B1 1.2.0 allows remote authenticated users to execute system commands. The administrative web interface accepts command-triggering requests without verifying that the logged-in user intended them. Exploitation also requires a logged-in administrator to visit a crafted page; successful requests run commands with router privileges.

CVSS severity5.3
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Telesquare SDT-CS3B1 1.2.0 allows remote authenticated users to execute system commands. The administrative web interface accepts command-triggering requests without verifying that the logged-in user intended them. Exploitation also requires a logged-in administrator to visit a crafted page; successful requests run commands with router privileges.

The record

CVE
CVE-2017-20221
Published
Mar 16, 2026
Updated
Mar 16, 2026
Vendor
Telesquare
Product
SDT-CS3B1
Classifications
CWE-352, T1204.001
Attack vector
network
Privileges
authenticated

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

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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 privilegesauthenticated

What is affected?

Telesquare · SDT-CS3B1version=1.2.0

Published CVSS scores

3.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
4.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1204.001User Execution: Malicious Link

Public exploit references

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

Technologies

Your stack

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Your stack

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