Security readout for executives and security teams
CVE-2019-17621 lets an unauthenticated attacker on the local network run commands as root on affected D-Link DIR-859 routers. For executives, this means a compromised router can become a foothold for surveillance, traffic manipulation, outages, or lateral movement inside the network. Exposure is most likely where D-Link DIR-859 routers run firmware 1.05 or 1.06B01 Beta01 and UPnP is reachable from the local network. The provided CVE data does not prove Internet-facing exposure, but local network access is enough to matter. Prioritize remediation as urgent for any business network using affected DIR-859 routers. The issue is critical, unauthenticated, root-level, and CISA KEV-listed. Replacement may be faster and lower risk than extended compensating controls if vendor remediation is unclear. Mitigation focus: Inventory D-Link DIR-859 routers and record exact firmware versions.; Check D-Link security bulletin and SAP10146/SAP10147 for vendor remediation guidance.; Remove or replace affected routers if vendor-supported remediation is unavailable..
Michael Williams reviewed this cited source version on .
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Open ATT&CK lookupCVE-2019-17621 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
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CISA KEV status
CVSS vector scores
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CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.ftc.gov/system/files/documents/cases/dlink_proposed_order_and_judgment_7-2-19.pdfCVE reference · x_refsource_MISC
- https://www.dlink.com/en/security-bulletinCVE reference · x_refsource_MISC
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10147CVE reference · x_refsource_CONFIRM
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10146CVE reference · x_refsource_CONFIRM
- https://medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-en-d94b47a15104CVE reference · x_refsource_MISC
- https://medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-es-fad716629ff9CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-17621CVE reference · government-resource
Products and packages named in the record
CWE details
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