Exploited CVEs / By vendor / Juniper

Juniper vulnerabilities actively exploited

8 Juniper CVEs on the CISA Known Exploited Vulnerabilities catalog, newest first. Refreshed daily.

Every CVE below is confirmed exploited in the wild, not just theoretically severe. The newest addition is CVE-2015-7755 (ScreenOS, added 2025-10-02). New CISA KEV entries appear here the day they are cataloged; the freshest across all vendors are on exploited this week.

8 exploited CVEs

Ask your own AI about Juniper exploited CVEs

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

Junos OS: 7 exploited CVEs

CVEProductAdded to KEVSignals
CVE-2025-21590Junos OS2025-03-13CVSS 4.4, EPSS 2%
CVE-2023-36844Junos OS2023-11-13CVSS 5.3, EPSS 90%
CVE-2023-36845Junos OS2023-11-13CVSS 9.8, EPSS 94%
CVE-2023-36846Junos OS2023-11-13CVSS 5.3, EPSS 94%
CVE-2023-36847Junos OS2023-11-13CVSS 5.3, EPSS 85%
CVE-2023-36851Junos OS2023-11-13CVSS 5.3, EPSS 1%
CVE-2020-1631Junos OS2022-03-25CVSS 9.8, EPSS 5%

Other Juniper products

CVEProductAdded to KEVSignals
CVE-2015-7755ScreenOS2025-10-02CVSS 9.8, EPSS 61%

Common questions about exploited Juniper CVEs

Which Juniper vulnerabilities are actively exploited?

As of July 2026, 8 Juniper CVEs are on the CISA Known Exploited Vulnerabilities catalog, meaning exploitation in the wild is confirmed. The most-listed products are Junos OS (7).

What is the newest exploited Juniper CVE?

CVE-2015-7755, affecting ScreenOS, added to the CISA KEV catalog on 2025-10-02. This page refreshes daily, so the newest entry is always first in the table.

How urgent are these Juniper CVEs?

KEV listing is the strongest fix-first signal there is: it means confirmed exploitation, not a prediction. Patch these ahead of higher-CVSS issues that nobody is exploiting. Check the vendor advisory (linked below) for fixed versions and workarounds.

Can I ask my own AI about exploited Juniper CVEs?

Yes. This page includes a free copy-paste AI prompt carrying the newest Juniper KEV entries, with CVSS, EPSS, and ransomware context, into Claude, ChatGPT, or Copilot. The data is refreshed daily.

Authoritative references

CISA Known Exploited Vulnerabilities CatalogNIST National Vulnerability DatabaseFIRST.org EPSS

All vendors, searchable with due dates and CSV export: the exploited-CVE tracker. Every vendor with a page: exploited by vendor.

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Lexicon: the terms on this page
CVE
Common Vulnerabilities and Exposures. A unique ID for one publicly known vulnerability, such as CVE-2025-1234.
KB
Microsoft Knowledge Base article. The identifier for a specific Microsoft update.
KEV
CISA Known Exploited Vulnerabilities. CVEs confirmed exploited in the wild. Fix these first.
CVSS
Common Vulnerability Scoring System. A standardized Severity score from 0 to 10.
EPSS
Exploit Prediction Scoring System. The probability a CVE will be exploited in the next 30 days.
MSRC
Microsoft Security Response Center. Microsoft's Patch Tuesday advisories and KB-to-CVE mapping.
NVD
National Vulnerability Database (NIST). Authoritative CVE metadata and CVSS scores.
Ransomware
The vulnerability is linked to known ransomware activity.
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