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Vulnerability record · CVE-2021-43663 · published 31 March 2022

CVE-2021-43663: Totolink ex300 v2 firmware command injection vulnerability

TTotolink · Ex300 V2 Firmware

totolink EX300_v2 V4.0.3c.140_B20210429 was discovered to contain a command injection vulnerability via the component cloudupdate_check.

7.5 CVSS 3.1 High EPSS 0.96% · top 40.1% CWE-77 · Command injection
7.5CVSS 3.1 base score, v2 7.9
0.96%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

totolink EX300_v2 V4.0.3c.140_B20210429 was discovered to contain a command injection vulnerability via the component cloudupdate_check.

CVSS:3.1/AV:A/AC:H/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://github.com/chibataiki/iot-vuls/blob/main/totolink/command-injection1.md ExploitThird Party Advisory
https://github.com/chibataiki/iot-vuls/blob/main/totolink/command-injection1.md ExploitThird Party Advisory

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Related vulnerabilities

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

9.8CVE-2022-32449Totolink ex300 v2 firmware command injection vulnerabilityTOTOLINK EX300_V2 V4.0.3c.7484 was discovered to contain a command injection vulnerability via the langType parameter in the setLanguageCfg function.…EPSS 19%8.8CVE-2022-25008Totolink ex300 v2 firmware missing authentication for critical function vulnerabilitytotolink EX300_v2 V4.0.3c.140_B20210429 and EX1200T V4.1.2cu.5230_B20210706 does not contain an authentication mechanism.EPSS 4.4%8.1CVE-2021-43664Totolink ex300 v2 firmware command injection vulnerabilitytotolink EX300_v2 V4.0.3c.140_B20210429 was discovered to contain a command injection vulnerability via the component process forceugpo.EPSS 1.7%6.5CVE-2021-43662Totolink ex300 v2 firmware allocation without limits vulnerabilitytotolink EX300_v2, ver V4.0.3c.140_B20210429 and A720R ,ver V4.1.5cu.470_B20200911 have an issue which causes uncontrolled resource consumption.EPSS 0.55%6.1CVE-2021-43661Totolink ex300 v2 firmware cross-site scripting vulnerabilitytotolink EX300_v2 V4.0.3c.140_B20210429 was discovered to contain a reflected cross-site scripting (XSS) vulnerability via the component /home.asp.EPSS 0.64%9.8CVE-2026-8037Progress LoadMaster API OS Command Injection RCEProgress LoadMaster (and related ADC products) contain an OS command injection flaw in multiple API command endpoints where unsanitized input is pass…KEVEPSS 77%analysed8.7CVE-2026-42271LiteLLM MCP test endpoints allow authenticated OS command injectionLiteLLM versions 1.74.2 through before 1.83.7 expose two MCP preview endpoints (POST /mcp-rest/test/connection and POST /mcp-rest/test/tools/list) th…KEVEPSS 13%analysed7.2CVE-2025-29635D-Link DIR-823X command injection in set_prohibiting handlerD-Link DIR-823X firmware (240126 and 240802) contains a command injection flaw in the /goform/set_prohibiting POST handler. An attacker who already h…KEVEPSS 88%analysed

Source: NIST National Vulnerability Database (record CVE-2021-43663), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.