⚠ Actively exploited
Added to CISA KEV on 2023-06-29. Federal agencies required to patch by 2023-07-20. Required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable..

CVE-2019-17621

CWE-78 — OS Command Injection8 documents7 sources
Severity
9.8CRITICAL
EPSS
93.0%
top 0.22%
CISA KEV
KEV
Added 2023-06-29
Due 2023-07-20
Exploit
Exploited in wild
Active exploitation observed
Affected products
13
Dlink Dir-822 FirmwareDlink Dir-823 FirmwareDlink Dir-859 Firmware+10 more
Timeline
PublishedDec 30
KEV addedJun 29
KEV dueJul 20
Latest updateJan 23
CISA Required Action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

Description

The UPnP endpoint URL /gena.cgi in the D-Link DIR-859 Wi-Fi router 1.05 and 1.06B01 Beta01 allows an Unauthenticated remote attacker to execute system commands as root, by sending a specially crafted HTTP SUBSCRIBE request to the UPnP service when connecting to the local network.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages13 packages

▶NVDdlink/dir-822_firmware2.03b01+1
▶NVDdlink/dir-823_firmware1.00b06+1
▶NVDdlink/dir-859_firmware1.05b03+1
▶NVDdlink/dir-869_firmware1.03b02+1

Patches

Patch: supportannouncement.us.dlink.com ↗Patch: supportannouncement.us.dlink.com ↗Patch: supportannouncement.us.dlink.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-4cjx-47hq-7hc2: The UPnP endpoint URL /gena↗2022-05-24
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CVEList
CVE-2019-17621: The UPnP endpoint URL /gena↗2019-12-30
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VulnCheck
D-Link DIR-859 Router Command Execution Vulnerability↗2019
▶

🔍Detection Rules

1
Suricata
ET WEB_SPECIFIC_APPS D-Link gena.cgi service Parameter Command Injection Attempt (CVE-2025-13562, CVE-2024-23624, CVE-2019-17621)↗2026-01-23
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📋Vendor Advisories

1
CISA
D-Link DIR-859 Router Command Execution Vulnerability↗2023-06-29
▶

🕵️Threat Intelligence

2
Unit42
IoT Under Siege: The Anatomy of the Latest Mirai Campaign Leveraging Multiple IoT Exploits↗2023-06-22
▶
Unit42
IoT Under Siege: The Anatomy of the Latest Mirai Campaign Leveraging Multiple IoT Exploits↗2023-06-22
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CVE-2019-17621 (CRITICAL CVSS 9.8) | The UPnP endpoint URL /gena.cgi in | cvebase.io