What’s Vulnerable › Vulnerabilities

CVE-2020-25757

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-12-15 · updated 2026-06-17
• Weakness: CWE-20

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.

Affected products

• Dlink Dsr-1000 Firmware: through 3.17
• Dlink Dsr-1000Ac Firmware: through 3.17
• Dlink Dsr-1000N Firmware: through 3.17
• Dlink Dsr-150 Firmware: through 3.17
• Dlink Dsr-150N Firmware: through 3.17
• Dlink Dsr-250 Firmware: through 3.17
• Dlink Dsr-250N Firmware: through 3.17
• Dlink Dsr-500 Firmware: through 3.17
• Dlink Dsr-500Ac Firmware: through 3.17
• Dlink Dsr-500N Firmware: all versions

References

• https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10195
• https://www.digitaldefense.com/news/zero-day-vuln-d-link-vpn-routers/
• https://www.dlink.com/en/security-bulletin
• https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10195
• https://www.digitaldefense.com/news/zero-day-vuln-d-link-vpn-routers/
• https://www.dlink.com/en/security-bulletin

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