Exploited CVEs / SonicWall / CVE-2026-15409
CVE-2026-15409
SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted, and the vulnerability is known to be used in ransomware campaigns. Federal agencies were required to remediate by 2026-07-17 (that deadline has passed); treat that date as the outer bound for your own environment. The fix is in the vendor advisory: SonicWall PSIRT Advisories, linked below.
Actively exploited SonicWall SMA1000 Appliances vulnerability, Critical severity, CVSS 10.0. Added to the CISA KEV catalog 2026-07-14.
Senserva AI Opinion for CVE-2026-15409
This SonicWall SMA1000 flaw lets a remote unauthenticated attacker force the appliance to make requests to attacker-chosen internal destinations, and at CVSS 10.0 it is scored as maximum severity. Since these appliances sit at the network edge for remote access, a successful SSRF can pivot into internal services normally shielded from the internet. It is confirmed exploited in the wild (CISA KEV, added 2026-07-14) with a 78% EPSS probability, so this is under active attack now.
Do this: Apply SonicWall's SMA1000 patch for CVE-2026-15409 immediately and review appliance logs for unexpected outbound or internal requests.
AI-generated from public data, 2026-07-25. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-15409
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-2026-15409
- Published
- 2026-07-14
- Last revised
- 2026-07-14
- Changes tracked
- 2
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.
The strongest signal is CVE-2026-15409's addition to the CISA KEV catalog on 2026-07-14, later reinforced by a ransomware link on 2026-08-03. EPSS climbed sharply from 1.3% on 2026-07-17 to 78.4% by 2026-07-24, then eased slightly to 74.2% on 2026-08-11. Severity settled at 10.0. This is confirmed, exploited, and high priority today.
Drawn by Senserva Vivid from the Senserva change record. Hover any point for its date and value.
- 2026-07-14 added to the CISA KEV catalog by CISA
- 2026-07-17 CVSS 0.0 to 10.0; EPSS first scored at 1.3%
- 2026-07-23 EPSS 1.3% to 16.3%
- 2026-07-24 EPSS 16.3% to 78.4%
- 2026-08-03 CVSS 10.0 to 0.0; linked to ransomware activity; CVSS 0.0 to 10.0
- 2026-08-11 EPSS 78.4% to 74.2%
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: 2026-07-17 (past due).
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Official fix for CVE-2026-15409
The authoritative fix and affected-version list are published by the vendor. Find the SMA1000 Appliances advisory on SonicWall PSIRT Advisories.
Common questions about CVE-2026-15409
Is CVE-2026-15409 actively exploited?
Yes. CVE-2026-15409 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2026-07-14, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 74%. CISA also reports it is known to be used in ransomware campaigns.
What is the CISA deadline and required action for CVE-2026-15409?
CISA set the federal (BOD 22-01) remediation due date at 2026-07-17, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
What fixes CVE-2026-15409?
The authoritative fix is in the vendor advisory: see SonicWall PSIRT Advisories for the patched SMA1000 Appliances 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-2026-15409?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2026-15409'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 SonicWall CVEs
- CVE-2026-15410CVE-2025-40602CVE-2023-44221CVE-2021-20035CVE-2024-53704CVE-2025-23006CVE-2024-40766CVE-2021-20028
All SonicWall exploited CVEs on one page: SonicWall 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.