PatchTheCVECVE-2021-41322: Poly VVX 400/410 5.3.1 allows low-privileged users to change the Admin password by modifying a POST parameter
CVE-2021-41322 is a high-severity flaw (CVSS 8.8) affecting vvx 400 firmware, vvx 410 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Poly VVX 400/410 5.3.1 allows low-privileged users to change the Admin password by modifying a POST parameter to 120 during the password reset process.
Why this priority
- High severity
- Public exploit reference
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 1.7% (top 23%) |
| CISA exploited list | No |
| Published | 2021-10-04 |
| 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-2021-41322?
vvx 400 firmware: mitigate or apply the listed mitigation; vvx 410 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2021-41322 being exploited?
CVE-2021-41322 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-2021-41322 affect?
CVE-2021-41322 affects vvx 400 firmware, vvx 410 firmware. Severity is high (CVSS 8.8). Poly VVX 400/410 5.3.1 allows low-privileged users to change the Admin password by modifying a POST parameter to 120 during the password reset process.
How urgent is CVE-2021-41322?
Priority 55/100. High severity; Public exploit reference