PatchTheCVECVE-2016-6670: Huawei S7700, S9300, S9700, and S12700 devices with software before V200R008C00SPC500 use random numbers with
CVE-2016-6670 is a medium-severity flaw (CVSS 5.3) affecting s12700, s9700 firmware, s7700 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Huawei S7700, S9300, S9700, and S12700 devices with software before V200R008C00SPC500 use random numbers with insufficient entropy to generate self-signed certificates, which makes it easier for remote attackers to discover private keys by leveraging knowledge of a certificate.
Why this priority
- Remotely exploitable, no login, no user action
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.8% (top 42%) |
| CISA exploited list | No |
| Weakness | CWE-200 |
| Published | 2016-09-07 |
| 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-2016-6670?
s12700: mitigate or apply the listed mitigation; s9700 firmware: mitigate or apply the listed mitigation; s7700 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2016-6670 being exploited?
CVE-2016-6670 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-2016-6670 affect?
CVE-2016-6670 affects s12700, s9700 firmware, s7700 firmware. Severity is medium (CVSS 5.3). Huawei S7700, S9300, S9700, and S12700 devices with software before V200R008C00SPC500 use random numbers with insufficient entropy to generate self-signed certificates, which makes it easier for remote attackers to discover private keys by
How urgent is CVE-2016-6670?
Priority 38/100. Remotely exploitable, no login, no user action