Threat Intelligence / CVE / CVE-2026-83548

CVE-2026-83548 — SonicWall SMA1000

CISA KEV

CVSS v3.1 10 (CRITICAL) · EPSS 0.2% (higher than 18.1% of all scored CVEs) · Priority 9/10 · Published 2026-09-01

As of 2026-09-03, CVE-2026-83548 is a CRITICAL-severity vulnerability in SonicWall SMA1000, CVSS v3.1 10, EPSS 0.2% (18.1th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-09-02), with a US federal remediation deadline of 2026-09-05. Threadlinqs Intelligence links 2 tracked threat campaigns to CVE-2026-83548, most recently “Eclypsium InfraTrust Report: Mass Active Exploitation of Network Management Systems (Cisco FMC/ISE CVE-2026-20079, CVE-2026-76460; SonicWall SMA 1000 CVE-2026-83548/83549; Linux Kernel CopyFail CVE-2026-31431)”.

Last updated: 2026-09-03

What is CVE-2026-83548?

A Pre-authentication SSRF vulnerability exists in the SMA1000 Appliance Work Place interface due to an unintended alternate access path. A remote unauthenticated attacker could potentially exploit this vulnerability to gain unauthorized access to sensitive functionality and perform unauthorized operations.

The record classifies CVE-2026-83548 under weakness classes CWE-918, CWE-441. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 23 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 10 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS (FIRST): 0.2% probability of exploitation in the next 30 days, higher than 18.1% of all scored CVEs
CISA KEV: Listed since 2026-09-02, federal remediation deadline 2026-09-05
Threadlinqs priority: 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published: 2026-09-01, last modified 2026-09-03

Is CVE-2026-83548 being exploited?

CISA added CVE-2026-83548 to the Known Exploited Vulnerabilities catalog on 2026-09-02, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-09-05 under BOD 22-01. It currently carries a trending score of 44 in the Threadlinqs vulnerability feed.

Affected products and versions

SonicWall: SMA1000

How to fix CVE-2026-83548

Vendor advisory: https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0016. Because CVE-2026-83548 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-09-05. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2026-83548

2 tracked threats in the Threadlinqs corpus reference CVE-2026-83548, either in the campaign’s CVE list or as an indicator on the campaign record.

Eclypsium InfraTrust Report: Mass Active Exploitation of Network Management Systems (Cisco FMC/ISE CVE-2026-20079, CVE-2026-76460; SonicWall SMA 1000 CVE-2026-83548/83549; Linux Kernel CopyFail CVE-2026-31431) — CRITICAL · 2026-09-23
SonicWall SMA1000 Chained Vulnerabilities (CVE-2026-83548, CVE-2026-83549) Exploited in the Wild — CRITICAL · 2026-09-03

Sources

Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV. Last verified by Threadlinqs on 2026-09-03. This product uses the NVD API but is not endorsed or certified by the NVD.

Vendor advisory and patch

psirt.global.sonicwall.com — vendor advisory

Full detection coverage & IOCs for threats exploiting CVE-2026-83548 are available via the Threadlinqs MCP server (Purple tier). View plans →

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