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CISA KEV · ACTIVELY EXPLOITED
CRITICAL severity

CVE-2026-15409

CRITICAL

CVE-2026-15409 is a critical-severity (CVSS 10) Server-Side Request Forgery (SSRF) vulnerability. It is in CISA's Known Exploited Vulnerabilities catalog (added 2026-07-14) and has been used in ransomware campaigns — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.

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…

Published
Updated
Affected
3 products
Patched
See advisory
Exploits
4 known
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

  • Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2026-07-14 — including use in ransomware campaigns. Federal agencies were required to remediate by 2026-07-17.
  • CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
  • A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2026-15409.

EPSS Exploitation Probability

via FIRST.org ↗
6.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs94th percentile — riskier than 94% of all scored CVEsHighest risk
0.00%33.3%66.7%100.0%78.4%83.7%6.8%6.8%Aug 26Oct 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2026-15409 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Description

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.

Affected Products

3 products · 18 configurations
OS
sma6210 firmwaresonicwall
6 versions
12.4.3-0324512.4.3-0338712.4.3-0343412.5.0-0228312.5.0-0262412.5.0-02800
OS
sma7210 firmwaresonicwall
6 versions
12.4.3-0324512.4.3-0338712.4.3-0343412.5.0-0228312.5.0-0262412.5.0-02800
Application
sma8200vsonicwall
6 versions
12.4.3-0324512.4.3-0338712.4.3-0343412.5.0-0228312.5.0-0262412.5.0-02800
Exploits & PoCs
4

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Detection & mitigation playbook

Vulnerability
  1. Detect

    Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

  2. Remediation status

    No fixed release is recorded for CVE-2026-15409 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.

  3. Mitigate without a patch

    Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

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Actively Exploited: CVE-2026-15409: SSRF (Critical 10)