CVE-2019-20500: D-Link DWL-2600AP web interface OS command injection

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 16 September 2026. Confidence: high.

high priorityThe flaw allows authenticated command execution and is in CISA KEV with very high EPSS, but requires access to the management interface and valid credentials.

What it is

The D-Link DWL-2600AP (firmware 4.2.0.15 Rev A) web interface fails to sanitize shell metacharacters in the configBackup or downloadServerip parameter of admin.cgi?action=config_save, allowing OS command injection. An attacker who can reach the management interface with valid credentials can execute arbitrary commands on the device.

Impact

An authenticated attacker gains arbitrary OS command execution on the access point, enabling full compromise of the device, data theft, and use as a pivot into the network.

Attack surface

Reached through the device web management interface via the Save Configuration function; the CVSS vector (AV:L/PR:L/UI:N) indicates local access and low privileges with no user interaction, though the description states authentication is required.

Exploitation

CVE-2019-20500 is listed in CISA KEV (added 2023-06-29) and has an EPSS 30-day probability of 0.97109 (99.9th percentile); a public Exploit-DB proof of concept is referenced. No ransomware campaign use is documented.

What to do

• Apply the vendor patch per D-Link advisory SAP10113, or discontinue use of the product if no update is available.
• Restrict management interface access to trusted administrative networks and disable remote/web management exposure to untrusted segments.
• Change default administrative credentials and enforce strong unique passwords on the device.
• Segment or isolate access points on a dedicated management VLAN to limit lateral movement if compromised.
• Monitor D-Link advisory and CISA KEV guidance for updated remediation instructions.

Detection

• Inspect web server and device logs for requests to admin.cgi?action=config_save containing shell metacharacters in configBackup or downloadServerip.
• Monitor for unexpected outbound connections or processes spawned on the access point that indicate command execution.
• Alert on authentication events to the device management interface from unusual source addresses or at anomalous times.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.