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Known exploited vulnerability

CVE-2026-15409

criticalCVSS 3.1 10.0In CISA KEVRansomwareEPSS 6.8%Published · SonicWall

The short answer

CVE-2026-15409 affects SonicWall SMA1000 and is rated critical (CVSS 10.0). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-07-14: attackers are using it, so patch it first.

What it is

A Server-side request forgery (SSRF) vulnerability has been identified in the SMA1000 Appliance Work Place interface. A remote unauthenticated attacker could potentially cause the appliance to make requests to unintended location.

Weakness: CWE-918.

Severity

10.0 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Exploited (CISA KEV)

Yes, since Jul 14, 2026

Federal due date Jul 17, 2026

EPSS, next 30 days

6.8%

Higher than 94% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

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…

Affected products

SMA1000. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2026-15409 being exploited?

Yes. CISA added CVE-2026-15409 to its Known Exploited Vulnerabilities catalog on 2026-07-14, with a federal remediation due date of 2026-07-17. CISA lists it as used in ransomware campaigns.

How do I fix CVE-2026-15409?

CISA's 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…

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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