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Known exploited · D-Link

CVE-2019-20500: D-Link DWL-2600AP Access Point Command Injection Vulnerability

What it is

D-Link DWL-2600AP access point contains an authenticated command injection vulnerability via the Save Configuration functionality in the Web interface, using shell metacharacters in the admin.cgi?action=config_save configBackup or downloadServerip parameter.

Added June 29, 2023Due July 20, 2023CISA KEV catalog 2026.10.01

Vendor
D-Link
Product
DWL-2600AP Access Point
Added to KEV
June 29, 2023
CISA due date
July 20, 2023
Ransomware use
Unknown

What CISA requires

Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

Forensic triage

No

What to do now

  1. Find every instance of DWL-2600AP Access Point you run, including the forgotten ones, and check its version against the vendor advisory.
  2. Apply the vendor's fix or mitigation, before July 20, 2023 if you are bound by CISA's deadline, sooner if it faces the internet.
  3. Assume it was tried against you already: look for signs of exploitation from the date it was added, not from the day you patched.
  4. Until every instance is patched, block the attack at the edge: a WAF in blocking mode stops OS command injection payloads, including Shellshock.

References

CVE-2019-20500 in the National Vulnerability Database

The Dome

Block it at the edge while you patch

The Dome's WAF runs the OWASP Core Rule Set in blocking mode and stops OS command injection payloads, including Shellshock before they reach your application.

See the Dome

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Source: CISA Known Exploited Vulnerabilities Catalog (public domain), catalog version 2026.10.01.