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Exploited vulnerability · CISA KEV

Is CVE-2026-15409 exploited? Yes: in CISA KEV since 14 Jul 2026

Gociux · SonicWall SMA1000 Appliances · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2026-15409, SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 14 Jul 2026, the day it was published. It is known to be used in ransomware campaigns. It affects SonicWall SMA1000 Appliances, an internet-facing product of the kind attackers use for initial access. If you run it, CISA's required action is: 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.

exploitedYesCISA KEV · 14 Jul 2026
ransomwareKnownused in campaigns
EPSStop 10%more likely than most to be exploited
severity10CVSS 3.1 · critical
US federal due17 Jul 2026BOD 22-01 deadline

What it is

SonicWall SMA1000 Appliances contain a server-side request forgery vulnerability that could allow a remote unauthenticated attacker to potentially cause the appliance to make requests to unintended location.

VendorSonicWall (20 exploited CVEs in KEV)
ProductSMA1000 Appliances
VulnerabilitySonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability
WeaknessCWE-918
Published14 Jul 2026
Added to KEV14 Jul 2026
Reported by (CNA)sonicwall

What to do

  1. Check whether you run it. Look for SMA1000 Appliances in your asset inventory, including appliances and cloud images. Stack check lists every exploited SonicWall CVE at once.
  2. Apply the fix. 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.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 14 Jul 2026.
  4. Get told next time. Email alerts when CISA adds a CVE for SonicWall.

Other exploited CVEs in SMA1000 Appliances

References

Questions

Is CVE-2026-15409 being exploited?

Yes. CISA added CVE-2026-15409 to the Known Exploited Vulnerabilities catalog on 14 Jul 2026, which means there is reliable evidence of exploitation in the wild.

Is CVE-2026-15409 used in ransomware attacks?

Yes, CISA lists it as known to be used in ransomware campaigns.

How do I fix CVE-2026-15409?

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. Check SonicWall's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected SMA1000 Appliances and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in July 2026 · SonicWall scorecard · act-now radar.

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