How severe is CVE-2018-12526?

CVE-2018-12526 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-12526 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-12526?

CVE-2018-12526 primarily affects Telesquare Sdt-cs3b1 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-12526?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-12526 published?

CVE-2018-12526 was published on 2018-06-21 and last updated on 2026-06-17.

CVE-2018-12526

CVE-2018-12526 is a critical-severity vulnerability in Telesquare Sdt-cs3b1 Firmware with a CVSS 3.x base score of 9.8. 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-798.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Telesquare Sdt-cs3b1 Firmware
Published: 2018-06-21
Last modified: 2026-06-17

Description

Telesquare SDT-CS3B1 and SDT-CW3B1 devices through 1.2.0 have a default factory account. Remote attackers can obtain access to the device via TELNET using a hardcoded account.

Frequently asked questions

What is CVE-2018-12526?: Telesquare SDT-CS3B1 and SDT-CW3B1 devices through 1.2.0 have a default factory account. Remote attackers can obtain access to the device via TELNET using a hardcoded account.
How severe is CVE-2018-12526?: CVE-2018-12526 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-12526 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-12526?: CVE-2018-12526 primarily affects Telesquare Sdt-cs3b1 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-12526?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-12526 published?: CVE-2018-12526 was published on 2018-06-21 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:telesquare:sdt-cs3b1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:telesquare:sdt-cw3b1_firmware:*:*:*:*:*:*:*:*

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CVE-2017-20224 — Critical (CVSS 9.8): Telesquare SKT LTE Router SDT-CS3B1 version 1.2.0 contains an arbitrary file upload vulnerability that allows…
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CVE-2021-46422 — Critical (CVSS 9.8): Telesquare SDT-CW3B1 1.1.0 is affected by an OS command injection vulnerability that allows a remote attacker to…
CVE-2017-20222 — High (CVSS 7.5): Telesquare SKT LTE Router SDT-CS3B1 software version 1.2.0 contains an unauthenticated remote reboot vulnerability that…
CVE-2017-20221 — Medium (CVSS 4.3): Telesquare SKT LTE Router SDT-CS3B1 version 1.2.0 contains a cross-site request forgery vulnerability that allows…

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