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ExploitedIn CISA KEVFix available

CVE-2019-17621

Exploitation confirmed. First attested on 2023-06-29 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

  • Published2019-12-30
  • WeaknessCWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2019-12-3017:15CVE publishedNVD
  2. 2023-06-29Added to the CISA KEV catalogCISA KEV
  3. 2023-06-29Listed as exploited by GCVEGCVE
  4. 2023-06-29Exploitation first reportedCISA KEV
  5. 2025-02-0420:33SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-17621?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-17621?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Dlink dir-822 firmwareversion to verify
BranchAffectedFixed in
2.3≤ 2.03b01no fix published
3.12≤ 3.12b04no fix published
Dlink dir-823 firmwareversion to verify
BranchAffectedFixed in
1.0≤ 1.00b06no fix published
1.0= 1.00b06no fix published
Dlink dir-859 firmwareversion to verify
BranchAffectedFixed in
1.5≤ 1.05b03no fix published
1.6= 1.06b01no fix published

11 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. CISA’s required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.due 2023-07-20

Advisories and patches

Detection

read 2026-11-03 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedSquirre17/CVE-2019-17621
PoC-in-GitHub
Metasploit modules
1 moduleexploit/linux/upnp/dlink_dir859_subscribe_execrank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2023-06-29
Patch Due Date
2023-07-20
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2019-12-30
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-4cjx-47hq-7hc2

Frequently asked questions

What is CVE-2019-17621?

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.

Is CVE-2019-17621 actively exploited?

Yes. CVE-2019-17621 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2023-07-20.

What is the CVSS score for CVE-2019-17621?

CVE-2019-17621 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record