CVE-2020-5129Network attack vector

Unauthenticated HTTP server crash via undisclosed requests

Published Mar 26, 2020 · Updated Aug 4, 2024

Uncaught exception in SonicWall SMA1000 HTTP Extraweb server 12.1.0-06411 and earlier allows remote attackers to crash the HTTP server. SonicWall identifies the affected server and exception class but does not disclose which request field or parsing operation leaves the exception unhandled. No authentication or user interaction is required; exploitation interrupts HTTP service without reported confidentiality or integrity impact.

CVSS severity7.5
High
EPSS probability1.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncaught exception in SonicWall SMA1000 HTTP Extraweb server 12.1.0-06411 and earlier allows remote attackers to crash the HTTP server. SonicWall identifies the affected server and exception class but does not disclose which request field or parsing operation leaves the exception unhandled. No authentication or user interaction is required; exploitation interrupts HTTP service without reported confidentiality or integrity impact.

The record

CVE
CVE-2020-5129
Published
Mar 26, 2020
Updated
Aug 4, 2024
Vendor
SonicWall
Product
SonicWall Secure Mobile Access 1000 Series
Classifications
CWE-444, CWE-248, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=12.1.0-06411 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SonicWall · SonicWall Secure Mobile Access 1000 Seriesversion=12.1.0-06411 and earlier

Published CVSS scores

5.0NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-444Inconsistent Interpretation of HTTP Requests
CWE-248Uncaught Exception
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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