Exploited CVEs / Juniper / CVE-2015-7755
CVE-2015-7755
Juniper ScreenOS Improper Authentication Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2025-10-23 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.
Risk summary
Actively exploited Juniper ScreenOS vulnerability, Critical severity, CVSS 9.8. Added to the CISA KEV catalog 2025-10-02.
Senserva AI Opinion for CVE-2015-7755
Juniper ScreenOS accepts unauthorized remote administrative logins due to an improper authentication flaw, effectively handing attackers the firewall itself. Notably, CISA added it to KEV in October 2025, a decade after disclosure, signaling exploitation against ScreenOS devices still in service. A compromised firewall exposes and can reroute everything behind it.
Do this: Locate any remaining ScreenOS devices immediately and replace them; hardware of that generation is beyond safe patching.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2015-7755
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Updated August 14, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Full tracking and change history for CVE-2015-7755
- Published
- 2025-10-02
- Last revised
- 2025-10-02
- Changes tracked
- 1
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
- 2025-10-02 added to the CISA KEV catalog by CISA
- 2026-07-17 CVSS 0.0 to 9.8; EPSS first scored at 61.4%
Recorded by Senserva on the dates shown, from CISA KEV and FIRST EPSS. This is what moved and when, which neither the vendor advisory nor NVD publishes.
CISA required action
Federal (BOD 22-01) remediation due date: 2025-10-23 (past due).
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Official fix for CVE-2015-7755
Check the vendor's security advisory channel for the patched ScreenOS versions and workarounds.
Common questions about CVE-2015-7755
Is CVE-2015-7755 actively exploited?
Yes. CVE-2015-7755 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2025-10-02, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 61%.
What is the CISA deadline and required action for CVE-2015-7755?
CISA set the federal (BOD 22-01) remediation due date at 2025-10-23, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
What fixes CVE-2015-7755?
Check the vendor's security advisory for the patched ScreenOS versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2015-7755?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2015-7755's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
Scope and sources
- More exploited Juniper CVEs
All Juniper exploited CVEs on one page: Juniper vulnerabilities actively exploited.
- Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.