How severe is CVE-2017-20221?

CVE-2017-20221 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2017-20221 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-20221?

CVE-2017-20221 affects Telesquare Sdt-cs3b1 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-20221?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2017-20221 have an EU (EUVD) identifier?

Yes. CVE-2017-20221 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-18936.

When was CVE-2017-20221 published?

CVE-2017-20221 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2017-20221

CVE-2017-20221 is a medium-severity vulnerability in Telesquare Sdt-cs3b1 Firmware with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v4: 5.3
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2017-18936
Weakness: CWE-352
Affected product: Telesquare Sdt-cs3b1 Firmware
Published: 2026-03-16
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2017-20221?: CVE-2017-20221 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2017-20221 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-20221?: CVE-2017-20221 affects Telesquare Sdt-cs3b1 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-20221?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2017-20221 have an EU (EUVD) identifier?: Yes. CVE-2017-20221 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-18936.
When was CVE-2017-20221 published?: CVE-2017-20221 was published on 2026-03-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:telesquare:sdt-cs3b1_firmware:1.2.0:*:*:*:*:*:*:*

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