Juniper vulnerabilities
- Juniper has 453 CVE records published between 28 Oct 2023 and 28 Oct 2026, ranking #34 of 420 vendors on this site by that count.
- Of the 453 with a CVSS score, 330 (72.8%) are rated critical or high; 0 (0% of all) have no CVSS score.
- 8 vulnerabilities attributed to Juniper are listed in CISA's Known Exploited Vulnerabilities (KEV) catalog; the most recent, CVE-2015-7755, was added on 2 Oct 2025.
- None of them is marked as known to be used in ransomware campaigns.
- For the 8 KEV entries with a published CVE record, the median time from CVE publication to KEV listing is 88 days.
Records are attributed to Juniper from the vendor named in the source records. About the data.
CVE records per year
Show data as a table
| Year | CVE records |
|---|---|
| 2017 | 80 |
| 2018 | 56 |
| 2019 | 73 |
| 2020 | 81 |
| 2021 | 134 |
| 2022 | 95 |
| 2023 | 100 |
| 2024 | 132 |
| 2025 | 94 |
| 2026 | 227 |
2026 is partial (through 28 Oct 2026), shown in a lighter bar.
| Year | Records | Critical | High | Critical or high | Not scored |
|---|---|---|---|---|---|
| 2026 | 227 | 27 | 164 | 84.1% | 0% |
| 2025 | 94 | 2 | 47 | 52.1% | 0% |
| 2024 | 132 | 3 | 87 | 68.2% | 0% |
| 2023 | 100 | 1 | 43 | 44% | 0% |
| 2022 | 95 | 0 | 51 | 53.7% | 0% |
| 2021 | 134 | 5 | 67 | 53.7% | 0% |
| 2020 | 81 | 4 | 41 | 55.6% | 0% |
| 2019 | 73 | 5 | 34 | 54.2% | 1.4% |
| 2018 | 56 | 7 | 21 | 50% | 0% |
| 2017 | 80 | 8 | 26 | 75.6% | 43.8% |
| Before 2017 | 1 | ||||
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Exploited vulnerabilities in CISA's KEV catalog
| CVE | Product | Name | Added | Ransomware |
|---|---|---|---|---|
| CVE-2015-7755 | ScreenOS | Juniper ScreenOS Improper Authentication Vulnerability | 2025-10-02 | Unknown |
| CVE-2025-21590 | Junos OS | Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability | 2025-03-13 | Unknown |
| CVE-2023-36844 | Junos OS | Juniper Junos OS EX Series PHP External Variable Modification Vulnerability | 2023-11-13 | Unknown |
| CVE-2023-36845 | Junos OS | Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability | 2023-11-13 | Unknown |
| CVE-2023-36846 | Junos OS | Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability | 2023-11-13 | Unknown |
| CVE-2023-36847 | Junos OS | Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability | 2023-11-13 | Unknown |
| CVE-2023-36851 | Junos OS | Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability | 2023-11-13 | Unknown |
| CVE-2020-1631 | Junos OS | Juniper Junos OS Path Traversal Vulnerability | 2022-03-25 | Unknown |
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.27, as of 27 Oct 2026. About the data.
Highest exploit-prediction scores (EPSS)
EPSS estimates the probability that a vulnerability is exploited in the next 30 days. These are the 10 highest-scoring Juniper records today.
| CVE | EPSS | Percentile | Severity | In KEV |
|---|---|---|---|---|
| CVE-2023-36845 | 95.1% | 99.9% | Critical | Yes |
| CVE-2023-36846 | 93.5% | 99.8% | Medium | Yes |
| CVE-2023-36844 | 90% | 99.8% | Medium | Yes |
| CVE-2023-36847 | 83.5% | 99.7% | Medium | Yes |
| CVE-2015-7755 | 61.1% | 99.2% | Critical | Yes |
| CVE-2026-21902 | 18.5% | 97.2% | Critical | No |
| CVE-2023-4481 | 18.4% | 97.2% | High | No |
| CVE-2024-21591 | 17.7% | 97.1% | Critical | No |
| CVE-2018-0001 | 6.3% | 93.6% | Critical | No |
| CVE-2017-10622 | 5.4% | 92.6% | Critical | No |
Source: FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.27, as of 27 Oct 2026. About the data.