Your RSA-2048 keys break in 2030. Find every one of them before attackers do.
🛡️
Not in CISA KEV
CRITICAL severity

CVE-2021-46422 — Sdt-Cs3b1 Firmware

CRITICAL

CVE-2021-46422 is a critical-severity (CVSS 9.8) OS Command Injection vulnerability in telesquare sdt-cs3b1 firmware. 8 public exploit references exist, so weaponization risk is real. No vendor fix is recorded yet; mitigation options are listed below.

Telesquare SDT-CW3B1 1.1.0 is affected by an OS command injection vulnerability that allows a remote attacker to execute OS commands without any authentication.

Published
Updated
Affected
1 product
Patched
See advisory
Exploits
8 known
Exploitation data as of Oct 21, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
94.4%probability of exploitation in next 30 days
Very High Risk+0.08%
Lower risk than most CVEs100th percentile — riskier than 100% of all scored CVEsHighest risk
93.4%93.9%94.4%94.9%93.9%93.9%93.9%94.3%94.4%Apr 26Jun 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2021-46422 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).

Where this sits among everything scored

Of 394,803 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.

Description

Telesquare SDT-CW3B1 1.1.0 is affected by an OS command injection vulnerability that allows a remote attacker to execute OS commands without any authentication.

Affected Products

1 product · 1 configurations
OS
sdt-cs3b1 firmwaretelesquare
1 version
1.1.0
Exploits & PoCs
8

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-50936remotehardware

SDT-CW3B1 1.1.0 - OS Command Injection

by Ahmed Alroky · May 17, 2022

Exploit-DB Source
EDB-50948remotehardware

Telesquare SDT-CW3B1 1.1.0 - OS Command Injection

by Bryan Leong · Jun 3, 2022

Exploit-DB Source

Detection & mitigation playbook

Vendor / appliance

  1. Detect

    Inventory every telesquare sdt-cs3b1 firmware deployment and check each version against the affected-products list above.

  2. Remediation status

    No patch has shipped for CVE-2021-46422 yet — track the telesquare sdt-cs3b1 firmware advisory for a fixed release and apply the workarounds below in the meantime.

  3. Mitigate without a patch

    Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

How to detect CVE-2021-46422

A community-maintained Nuclei template exists for this CVE. You can scan for it directly:

nuclei -id cve-2021-46422 -u https://target
Template
SDT-CW3B1 1.1.0 - OS Command Injection
Severity
critical
Impact
Successful exploitation of this vulnerability allows an attacker to execute arbitrary commands on the target system.
Remediation
Upgrade to a patched version of SDT-CW3B1 or apply the vendor-supplied patch to mitigate this vulnerability.

Template by ProjectDiscovery nuclei-templates (badboycxcc, prajiteshsingh), MIT licensed. View the full template. Scan only systems you are authorised to test.

Frequently Asked Questions

Telesquare SDT-CW3B1 1.1.0 is affected by an OS command injection vulnerability that allows a remote attacker to execute OS commands without any authentication.
O3 Security · Runtime Protection

Is CVE-2021-46422 being exploited in your environment?

Detect and block the exploit chain at execution, on systems you cannot patch yet.

Protect my workloads How runtime protection works
CVE-2021-46422: Sdt Command Injection (Critical 9.8)