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Vulnerability record · CVE-2021-33841 · published 9 June 2021

CVE-2021-33841: Circutor sge-plc1000 firmware os command injection vulnerability

Circutor · Sge Plc1000 Firmware

SGE-PLC1000 device, in its 0.9.2b firmware version, does not handle some requests correctly, allowing a remote attacker to inject code into the operating system with maximum privileges.

9.8 CVSS 3.1 Critical EPSS 2.2% · top 17.8% CWE-78 · OS command injection
9.8CVSS 3.1 base score, v2 10.0
2.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

SGE-PLC1000 device, in its 0.9.2b firmware version, does not handle some requests correctly, allowing a remote attacker to inject code into the operating system with maximum privileges.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.incibe.es/en/incibe-cert/notices/aviso-sci/circutor-sge-plc1000-os-command-injection
https://www.incibe.es/en/incibe-cert/notices/aviso-sci/circutor-sge-plc1000-os-command-injection

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2025-11778Circutor sge-plc1000 firmware heap-based buffer overflow vulnerabilityStack-based buffer overflow in Circutor SGE-PLC1000/SGE-PLC50 v0.9.2. This vulnerability allows an attacker to remotely exploit memory corruption thr…EPSS 0.35%9.4CVE-2025-11779Circutor sge-plc1000 firmware stack-based buffer overflow vulnerabilityStack-based buffer overflow vulnerability in CircutorSGE-PLC1000/SGE-PLC50 v9.0.2. The 'SetLan' function is invoked when a new configuration is appli…EPSS 1.3%8.8CVE-2021-33842Circutor sge-plc1000 firmware reliance on cookies without validation vulnerabilityImproper Authentication vulnerability in the cookie parameter of Circutor SGE-PLC1000 firmware version 0.9.2b allows an attacker to perform operation…EPSS 0.43%8.7CVE-2025-11780Circutor sge-plc1000 firmware classic buffer overflow vulnerabilityStack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'showMeterReport()' function, there is an unlimited user i…EPSS 0.33%8.6CVE-2025-11781Circutor sge-plc1000 firmware vulnerabilityUse of hardcoded cryptographic keys in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. The affected firmware contains a hardcoded static authentication key. A…EPSS 0.14%8.5CVE-2025-11788Circutor sge-plc1000 firmware heap-based buffer overflow vulnerabilityHeap-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'ShowSupervisorParameters()' function, there is an unlimite…EPSS 0.33%8.5CVE-2025-11785Circutor sge-plc1000 firmware stack-based buffer overflow vulnerabilityStack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'ShowMeterPasswords()' function, there is an unlimited use…EPSS 0.37%8.5CVE-2025-11786Circutor sge-plc1000 firmware stack-based buffer overflow vulnerabilityStack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'SetUserPassword()' function, the 'newPassword' parameter …EPSS 0.37%

Source: NIST National Vulnerability Database (record CVE-2021-33841), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.