HyperFlex HX vulnerabilities: known CVEs & security history
Cisco · Actively exploited · 11 tracked CVEs · 2 actively exploited · updated June 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all HyperFlex HX release lines — 11 in total, with 2 actively exploited in the wild. A CVE here doesn't mean your version is affected — check HyperFlex HX's current status and the safe version to run.
Known HyperFlex HX CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2021-1498⚡ exploited | critical | 9.8 | 100% | 2021 |
| CVE-2021-1497⚡ exploited | critical | 9.8 | 100% | 2021 |
| CVE-2019-1958 | high | 8.8 | 1% | 2019 |
| CVE-2018-15382 | high | 8.6 | 1% | 2018 |
| CVE-2019-1664 | high | 7.8 | 0% | 2019 |
| CVE-2017-12315 | medium | 6 | 0% | 2017 |
| CVE-2021-1499 | medium | 5.3 | 80% | 2021 |
| CVE-2019-1666 | medium | 5.3 | 2% | 2019 |
| CVE-2023-20263 | medium | 4.7 | 0% | 2023 |
| CVE-2019-1665 | medium | 4.7 | 1% | 2019 |
| CVE-2019-1667 | low | 3.3 | 0% | 2019 |
Is my HyperFlex HX version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your HyperFlex HX version → · Monitor HyperFlex HX for new CVEs →
HyperFlex HX vulnerabilities — frequently asked
How many known vulnerabilities does HyperFlex HX have?
IsItPatched tracks 11 CVEs for HyperFlex HX, 2 of which are actively exploited (CISA KEV). 2 are critical-severity and 3 high-severity. These span every release line — what matters is whether the version you run is affected.
Does HyperFlex HX have any actively-exploited vulnerabilities?
Yes — 2 HyperFlex HX CVEs are in CISA's Known Exploited Vulnerabilities catalog, meaning they are confirmed exploited in the wild. Patch these as a priority.
What is the most severe HyperFlex HX vulnerability?
Among tracked issues, CVE-2021-1498 (CRITICAL, CVSS 9.8), which is actively exploited, ranks highest — a OS command injection weakness.
Is HyperFlex HX safe to use?
It depends on the version. The latest supported HyperFlex HX release clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: HyperFlex HX security status · HyperFlex HX end-of-life · actively-exploited CVEs. Always verify against Cisco's advisories — see our disclaimer.