CVE-2020-25757

Name: CVE-2020-25757
Creator: NVD / NIST
Published: 2020-12-15T20:15:16.183+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.04%

Last modified Jun 17, 2026

CVE-2020-25757 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A lack of input validation and access controls in Lua CGIs on D-Link DSR VPN routers may result in arbitrary input being passed to system command APIs, resulting in arbitrary command execution with root privileges. This affects DSR-150, DSR-250, DSR-500, and DSR-1000AC with firmware 3.14 and 3.17.. EPSS estimates a 2.04% chance of exploitation in the next 30 days.

Description

A lack of input validation and access controls in Lua CGIs on D-Link DSR VPN routers may result in arbitrary input being passed to system command APIs, resulting in arbitrary command execution with root privileges. This affects DSR-150, DSR-250, DSR-500, and DSR-1000AC with firmware 3.14 and 3.17.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

2.04%

78.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dlink	Dsr-150 Firmware	<= 3.17
Dlink	Dsr-150n Firmware	<= 3.17
Dlink	Dsr-250 Firmware	<= 3.17
Dlink	Dsr-250n Firmware	<= 3.17
Dlink	Dsr-500 Firmware	<= 3.17
Dlink	Dsr-500n Firmware	All versions
Dlink	Dsr-500ac Firmware	<= 3.17
Dlink	Dsr-1000 Firmware	<= 3.17
Dlink	Dsr-1000n Firmware	<= 3.17
Dlink	Dsr-1000ac Firmware	<= 3.17

References

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10195Vendor Advisory
https://www.digitaldefense.com/news/zero-day-vuln-d-link-vpn-routers/Third Party Advisory
https://www.dlink.com/en/security-bulletinVendor Advisory
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10195Vendor Advisory
https://www.digitaldefense.com/news/zero-day-vuln-d-link-vpn-routers/Third Party Advisory
https://www.dlink.com/en/security-bulletinVendor Advisory

Timeline

Published: Dec 15, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-25757?

How severe is CVE-2020-25757?

CVE-2020-25757 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.04% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25757?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-25757?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST