PatchTheCVECVE-2021-33822: An issue was discovered on 4GEE ROUTER HH70VB Version HH70_E1_02.00_22
CVE-2021-33822 is a high-severity flaw (CVSS 7.5) affecting 4gee router hh70vb firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An issue was discovered on 4GEE ROUTER HH70VB Version HH70_E1_02.00_22. Attackers can use slowhttptest tool to send incomplete HTTP request, which could make server keep waiting for the packet to finish the connection, until its resource exhausted. Then the web server is denial-of-service.
Why this priority
- High severity
- Public exploit reference
- Remotely exploitable, no login, no user action
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.9% (top 20%) |
| CISA exploited list | No |
| Weakness | CWE-400 |
| Published | 2021-06-18 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-33822?
4gee router hh70vb firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2021-33822 being exploited?
CVE-2021-33822 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-33822 affect?
CVE-2021-33822 affects 4gee router hh70vb firmware. Severity is high (CVSS 7.5). An issue was discovered on 4GEE ROUTER HH70VB Version HH70_E1_02.00_22. Attackers can use slowhttptest tool to send incomplete HTTP request, which could make server keep waiting for the packet to finish the connection, until its resource ex
How urgent is CVE-2021-33822?
Priority 56/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action