VulnTideExploited vulnerabilities, by vendor. Data as of 28 Oct 2026.
Known exploitedIn CISA's KEV catalog since 29 June 2023Ransomware use: unknown
D-Link DIR-859 Router

CVE-2019-17621: D-Link DIR-859 Router Command Execution Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 29 Jun 2023, 1,277 days after the CVE record was published.

How likely is exploitation in the next 30 days?
90.6%

EPSS score, percentile 99.8 of all scored records

How severe?
9.8 Critical

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

CISA deadline 20 Jul 2023. Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Not stated. The CVE record gives vendor and product as “n/a” and the version as “unspecified”.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

Required action, set by CISA

Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

CISA due date for this action: 20 July 2023.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

Affected products and versions

The CVE record does not name affected products or versions: vendor and product are “n/a” and the version is “unspecified”.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

D-Link DIR-859 router contains a command execution vulnerability in the UPnP endpoint URL, /gena.cgi. Exploitation 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.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

  • CISA added CVE-2019-17621 to its Known Exploited Vulnerabilities (KEV) catalog on 29 Jun 2023.
  • CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
  • The due date CISA sets for the required action is 20 Jul 2023.
  • The CVE record was published on 30 Dec 2019, 1,277 days before it was added to KEV.
  • The CVE record carries a CVSS v3.1 base score of 9.8 (Critical), taken from CISA's enrichment of the record.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 90.6% (percentile 99.8), as of 28 Oct 2026.
  • CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

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.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

  • CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

DateEvent
30 Dec 2019CVE record published
29 Jun 2023Added to CISA KEV
20 Jul 2023CISA due date for the required action
21 Oct 2025CVE record last updated

References

More exploited D-Link vulnerabilities

  • CVE-2025-29635: D-Link DIR-823X Command Injection Vulnerability (added 24 Apr 2026)
  • CVE-2022-37055: D-Link Routers Buffer Overflow Vulnerability (added 8 Dec 2025)
  • CVE-2020-25078: D-Link DCS-2530L and DCS-2670L Devices Unspecified Vulnerability (added 5 Aug 2025)
  • CVE-2020-25079: D-Link DCS-2530L and DCS-2670L Command Injection Vulnerability (added 5 Aug 2025)
  • CVE-2022-40799: D-Link DNR-322L Download of Code Without Integrity Check Vulnerability (added 5 Aug 2025)
  • CVE-2024-0769: D-Link DIR-859 Router Path Traversal Vulnerability (added 25 Jun 2025)