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Vulnerabilities

Vulnerability · CVE-2017-20221

Telesquare SKT LTE Router SDT-CS3B1 version 1.2.0 contains a cross-site request forgery vulnerability that allows authenticated attackers to execute arbitrary system c…

Published Mar 16, 2026 · catalog updated Jun 17, 2026 · sdt-cs3b1 firmware

Check if you run it

No confirmed exploitation is on record for CVE-2017-20221. EPSS is 0.29%. Act only if a listed version of sdt-cs3b1 firmware is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.29%
Remediation
Advisory link
Affected products
cpe telesquare/sdt-cs3b1 firmware

Telesquare SKT LTE Router SDT-CS3B1 version 1.2.0 contains a cross-site request forgery vulnerability that allows authenticated attackers to execute arbitrary system commands by exploiting missing request validation. Attackers can craft malicious web pages that perform administrative actions when visited by logged-in users, enabling command execution with router privileges.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe telesquare/sdt-cs3b1 firmware1.2.0

How to fix CVE-2017-20221

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2017-20221. EPSS is 0.29%. Act only if a listed version of sdt-cs3b1 firmware is installed.

Which versions are affected?

Compare what you have installed with telesquare/sdt-cs3b1 firmware 1.2.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-352: Cross-Site Request Forgery (CSRF). EPSS 0.29%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 16, 2026 · NIST NVD

    Detected

    Telesquare SKT LTE Router SDT-CS3B1 version 1.2.0 contains a cross-site request forgery vulnerability that allows authenticated attackers to execute arbitrary system commands by exploiting missing request validation. Attackers can craft malicious web pages that perform administrative actions when visited by logged-in users, enabling command execution with router privileges.

  2. Jun 17, 2026 · NIST NVD

    Updated

    Telesquare SKT LTE Router SDT-CS3B1 version 1.2.0 contains a cross-site request forgery vulnerability that allows authenticated attackers to execute arbitrary system commands by exploiting missing request validation. Attackers can craft malicious web pages that perform administrative actions when visited by logged-in users, enabling command execution with router privileges.

Sources

  • CVE.orgVulnerability recordCVE-2017-20221

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2017-20221

    30-day exploitation probability 0.29%

    first.org
  • NIST NVDVulnerability recordCVE-2017-20221

    Telesquare SKT LTE Router SDT-CS3B1 version 1.2.0 contains a cross-site request forgery vulnerability that allows authenticated attackers to execute arbitrary system commands by exploiting missing request validation. Attackers can craft malicious web pages that perform administra

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttps://packetstormsecurity.com/files/145550

    Packet Storm link already published on the finding.

    packetstormsecurity.com

References

Freshness

Last verified in this catalog Oct 21, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.