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Vulnerability record · CVE-2020-5129 · published 26 March 2020

CVE-2020-5129: Sonicwall sma1000 firmware http request smuggling vulnerability

Sonicwall · Sma1000 Firmware

A vulnerability in the SonicWall SMA1000 HTTP Extraweb server allows an unauthenticated remote attacker to cause HTTP server crash which leads to Denial of Service. This vulnerability affected SMA1000 Version 12.1.0-06411 and earlier.

7.5 CVSS 3.1 High EPSS 1.3% · top 30.7% CWE-248 · CWE-248CWE-444 · HTTP request smuggling
7.5CVSS 3.1 base score, v2 5.0
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A vulnerability in the SonicWall SMA1000 HTTP Extraweb server allows an unauthenticated remote attacker to cause HTTP server crash which leads to Denial of Service. This vulnerability affected SMA1000 Version 12.1.0-06411 and earlier.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0002 Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0002 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2022-0847Linux kernel pipe buffer flaw allows local privilege escalationThe flags member of the new pipe buffer structure was not properly initialized in copy_page_to_iter_pipe and push_pipe, so it could hold stale values…KEVEPSS 93%analysed7.8CVE-2021-33909Linux kernel integer overflow vulnerabilityfs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow…EPSS 9.7%7.5CVE-2023-0126SonicWall SMA1000 firmware pre-auth path traversal file disclosureSMA1000 firmware version 12.4.2 contains a pre-authentication path traversal flaw (CWE-22) that lets an unauthenticated attacker read arbitrary files…EPSS 73%analysed7.2CVE-2025-2170Sonicwall sma1000 firmware server-side request forgery (ssrf) vulnerabilityA Server-side request forgery (SSRF) vulnerability has been identified in the SMA1000 Appliance Work Place interface, which in specific conditions co…EPSS 0.34%

Source: NIST National Vulnerability Database (record CVE-2020-5129), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.