CVE-2026-83548: SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability

What it is

SonicWall SMA1000 Appliances contains a server-side request forgery vulnerability that could allow a remote unauthenticated attacker to gain unauthorized access to sensitive functionality and perform unauthorized operations.

What to do

Treat this as urgent. Identify every affected system, starting with anything internet-facing, and apply the vendor fix or mitigation within days. If you cannot patch quickly, isolate or disable the affected service and watch for signs of compromise.

Priority

Act now: Patch or mitigate internet-facing systems within days.

Severity (CVSS)

10 critical

CISA assessment (SSVC)

actively exploited; attackers can automate it at scale; total control of the affected system

Exploit probability (EPSS, 30 days)

8.0%, higher than 94% of all CVEs

Added to CISA KEV

2 September 2026

CISA fix-by date

5 September 2026 (US federal agencies; a sensible deadline for everyone)

Ransomware use

Not known

Weakness

CWE-441, CWE-918

References

• NIST NVD entry
• CISA KEV entry
• psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0016
• www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-83548

Sources: CISA Known Exploited Vulnerabilities · FIRST Exploit Prediction Scoring System (EPSS) · NIST National Vulnerability Database · CISA Vulnrichment (SSVC), via the CVE Program. This product uses data from the NVD API but is not endorsed or certified by the NVD. Summaries are machine-written from CISA’s description; treat the vendor’s advisory as the authority for fixes.