# CVE-2019-7481 — SonicWall SMA100

**CISA KEV** · **Ransomware**

> As of 2026-08-12, CVE-2019-7481 is a HIGH-severity vulnerability in SonicWall SMA100, CVSS v3.1 7.5, EPSS 99.9% (99.9th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), with a US federal remediation deadline of 2022-05-03, and CISA links it to known ransomware campaigns. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2019-7481, most recently “Coordinated Reconnaissance Campaign Maps SonicWall SSL VPN Attack Surface via Commercial Proxy Infrastructure (84,142 Sessions / 4,305 IPs / 20 ASNs)”.

**Last updated:** 2026-08-12

## What is CVE-2019-7481?

Vulnerability in SonicWall SMA100 allow unauthenticated user to gain read-only access to unauthorized resources. This vulnerablity impacted SMA100 version 9.0.0.3 and earlier.

The record classifies CVE-2019-7481 under weakness class [CWE-89](https://intel.threadlinqs.com/cwe/CWE-89). 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. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 2496 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.5 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **EPSS (FIRST):** 99.9% probability of exploitation in the next 30 days, higher than 99.9% of all scored CVEs
- **CISA KEV:** Listed since 2021-11-03, federal remediation deadline 2022-05-03 — used in known ransomware campaigns
- **Threadlinqs priority:** 10/10 — CISA lists it as used in ransomware, which Threadlinqs scores at the maximum
- **Published:** 2019-12-17, last modified 2026-08-12

## Is CVE-2019-7481 being exploited?

CISA added CVE-2019-7481 to the Known Exploited Vulnerabilities catalog on 2021-11-03, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2022-05-03 under BOD 22-01. CISA flags the vulnerability as one used in known ransomware campaigns. Weaponised exploit code for CVE-2019-7481 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. A ProjectDiscovery Nuclei detection template exists (`http/cves/2019/CVE-2019-7481.yaml`). It currently carries a trending score of 50 in the Threadlinqs vulnerability feed.

- [trickest/cve](https://github.com/trickest/cve/blob/main/2019/CVE-2019-7481.md) (trickest)

## Affected products and versions

- [SonicWall](https://intel.threadlinqs.com/vendors/sonicwall): SMA100

## How to fix CVE-2019-7481

Because CVE-2019-7481 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2022-05-03. No vendor patch reference has been recorded for CVE-2019-7481 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2019-7481

1 tracked threat in the Threadlinqs corpus references CVE-2019-7481, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Coordinated Reconnaissance Campaign Maps SonicWall SSL VPN Attack Surface via Commercial Proxy Infrastructure (84,142 Sessions / 4,305 IPs / 20 ASNs)](https://intel.threadlinqs.com/threat/TL-2026-1468) — HIGH · 2026-02-25

## Sources

Enriched from CVE.org, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories, ProjectDiscovery Nuclei. Last verified by Threadlinqs on 2026-10-10.

**Vendor advisory and patch**

- [psirt.global.sonicwall.com](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0016)

Canonical: https://intel.threadlinqs.com/cve/CVE-2019-7481
Full detection coverage and IOCs for threats exploiting CVE-2019-7481 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp