Junos OS vulnerabilities: known CVEs & security history
Juniper · Actively exploited · 17 tracked CVEs · 0 actively exploited · updated August 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Junos OS release lines — 17 in total. A CVE here doesn't mean your version is affected — check Junos OS's current status and the safe version to run.
Known Junos OS CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2026-33788 | high | 7.8 | 0% | 2026 |
| CVE-2026-57026 | high | 7.5 | 0% | 2026 |
| CVE-2026-57023 | high | 7.5 | 0% | 2026 |
| CVE-2026-57032 | medium | 6.5 | 0% | 2026 |
| CVE-2026-57027 | medium | 6.5 | 0% | 2026 |
| CVE-2026-57020 | medium | 6.5 | 0% | 2026 |
| CVE-2026-57019 | medium | 6.5 | 0% | 2026 |
| CVE-2026-33801 | medium | 6.5 | 0% | 2026 |
| CVE-2026-33774 | medium | 6.5 | 0% | 2026 |
| CVE-2026-57030 | medium | 5.9 | 0% | 2026 |
| CVE-2026-57022 | medium | 5.9 | 0% | 2026 |
| CVE-2026-57054 | medium | 5.8 | 0% | 2026 |
| CVE-2026-57025 | medium | 5.5 | 0% | 2026 |
| CVE-2026-33802 | medium | 5.5 | 0% | 2026 |
| CVE-2026-57024 | medium | 5.3 | 0% | 2026 |
| CVE-2026-57021 | medium | 5.3 | 0% | 2026 |
| CVE-2026-33799 | medium | 4.3 | 0% | 2026 |
Is my Junos OS 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 Junos OS version → · Monitor Junos OS for new CVEs →
Junos OS vulnerabilities — frequently asked
How many known vulnerabilities does Junos OS have?
IsItPatched tracks 17 CVEs for Junos OS. 0 are critical-severity and 3 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Junos OS have any actively-exploited vulnerabilities?
None of Junos OS's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe Junos OS vulnerability?
Among tracked issues, CVE-2026-33788 (HIGH, CVSS 7.8) ranks highest — a Missing authentication weakness.
Is Junos OS safe to use?
It depends on the version. The latest supported Junos OS 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: Junos OS security status · Junos OS end-of-life · actively-exploited CVEs. Always verify against Juniper's advisories — see our disclaimer.