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Vulnerability record · CVE-2020-9377 · published 9 July 2020

CVE-2020-9377: D-Link DIR-610 command.php OS command injection

Dlink · Dir 610 Firmware

D-Link DIR-610 firmware passes the cmd parameter to command.php without sanitizing it, allowing OS command injection. The product is end-of-life and no longer supported by the vendor, so no fix will be issued.

8.8 CVSS 3.1 High CISA KEV since 25 Mar 2022 EPSS 21% · top 2.5% CWE-78 · OS command injection
8.8CVSS 3.1 base score, v2 6.5
21%EPSS exploitation probability, 30 days
YesIn CISA KEV, fix deadline passed
1Affected product versions listed by NVD
7References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

D-Link DIR-610 devices allow Remote Command Execution via the cmd parameter to command.php. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

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

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 17 September 2026. Confidence: high.

critical priorityThe flaw is an unpatched OS command injection in an end-of-life device that is in CISA KEV with public exploit code and high EPSS probability.

What it is

D-Link DIR-610 firmware passes the cmd parameter to command.php without sanitizing it, allowing OS command injection. The product is end-of-life and no longer supported by the vendor, so no fix will be issued.

Impact

An authenticated attacker can execute arbitrary OS commands on the device, gaining full control of the router and any traffic or credentials it handles.

Attack surface

Reachable over the network via HTTP requests to command.php with a crafted cmd parameter. The CVSS vector indicates low privileges are required and no user interaction is needed.

Exploitation

Listed in CISA KEV since 2022-03-25 with a required action to disconnect the end-of-life device, and EPSS shows a 30-day probability of 0.213 (97th percentile). References are tagged Exploit, confirming public exploit code exists.

What to do

  • Retire or replace the DIR-610; the vendor states it is end-of-life and will not patch it
  • If the device must remain, disconnect it from the internet and restrict management access to a trusted internal segment
  • Change default administrative credentials and disable remote management
  • Monitor for and block outbound connections from the device to unexpected destinations
  • Segment the device on an isolated VLAN with no access to sensitive internal systems

Detection

  • Inspect HTTP request logs for command.php requests with cmd parameters containing shell metacharacters such as ;, |, &&, or backticks
  • Alert on unexpected processes or outbound connections originating from the router's management IP
  • Monitor for authentication attempts against the router's web interface followed by command.php access

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

Exploitation in the wild

CISA added CVE-2020-9377 to the Known Exploited Vulnerabilities catalog on 25 March 2022 as "D-Link DIR-610 Devices Remote Command Execution". Required action: The impacted product is end-of-life and should be disconnected if still in use. Federal deadline 15 April 2022.

Affected products

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

References

LinkTags
https://gist.github.com/GouveaHeitor/131557f9de7d571f118f59805df852dc Broken LinkExploitPatchThird Party Advisory
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10182 ExploitVendor Advisory
https://www.dlink.com.br/produto/dir-610/ ProductVendor Advisory
https://gist.github.com/GouveaHeitor/131557f9de7d571f118f59805df852dc Broken LinkExploitPatchThird Party Advisory
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10182 ExploitVendor Advisory
https://www.dlink.com.br/produto/dir-610/ ProductVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9377 US Government Resource

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Source: NIST National Vulnerability Database (record CVE-2020-9377), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.