CVE-2019-20500Known exploitationPublic exploitNetwork attack vector

Authenticated command execution via configuration backup parameters

Published Mar 5, 2020 · Updated Oct 21, 2025

OS command injection in D-Link DWL-2600AP Revision A firmware 4.2.0.15 and earlier allows remote authenticated users to execute commands. The admin.cgi Save Configuration handler passes configBackup and downloadServerip values directly to a TFTP command without validating shell metacharacters. Valid web-interface credentials are required, and injected commands execute on the access point with the service account's privileges.

CVSS severity7.8
High
EPSS probability97.11%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in D-Link DWL-2600AP Revision A firmware 4.2.0.15 and earlier allows remote authenticated users to execute commands. The admin.cgi Save Configuration handler passes configBackup and downloadServerip values directly to a TFTP command without validating shell metacharacters. Valid web-interface credentials are required, and injected commands execute on the access point with the service account's privileges.

The record

CVE
CVE-2019-20500
Published
Mar 5, 2020
Updated
Oct 21, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 5, 2020CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C

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
Privilegesauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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