CVE-2026-6889

✕ Withdrawn — historical dataMEDIUMPre-NVD 6.9
6.9CVSS
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 6.9Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A denial of service vulnerability in the Advantech ECU-1251D allows a network-adjacent attacker to send a DNP3 signal to the Digital Output address of the device, causing the DNP3Daemon to invoke a non-existent system file and enter an indefinite restart loop. While the device remains partially accessible via its web panel or direct signals, an operator using SCADA TelWin is unable to reconnect until the device is manually restarted.

CVSS v3
6.9
EchelonGraph score
Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
EG Score
—
EG Risk
—
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

Published

July 31, 2026

Last Modified

July 31, 2026

Advisory Details (1)

Auto-updated Jul 31, 2026
No patch confirmed yet.
generic

Vulnerabilities in Advantech ECU-1251D Products | Cyber Security Agency of Singapore

https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-095/

Vendor Advisories for CVE-2026-6889(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 2× in last 7d / 12× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-20 02:58 UTCGHSA enrichment
  2. 2026-08-16 23:33 UTCGHSA enrichment
  3. 2026-08-13 20:08 UTCGHSA enrichment
  4. 2026-08-10 16:44 UTCGHSA enrichment
  5. 2026-08-07 13:19 UTCGHSA enrichment
  6. 2026-08-04 09:55 UTCGHSA enrichment
  7. 2026-08-01 05:57 UTCEG score recompute▼ 6.90
  8. 2026-08-01 05:57 UTCGHSA enrichment
  9. 2026-07-31 03:37 UTCEG score recompute
  10. 2026-07-31 03:37 UTCGHSA enrichment
  11. 2026-07-31 02:50 UTCEG score recompute
  12. 2026-07-31 02:49 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-6889?
CVE-2026-6889 is a medium vulnerability published on July 31, 2026. A denial of service vulnerability in the Advantech ECU-1251D allows a network-adjacent attacker to send a DNP3 signal to the Digital Output address of the device, causing the DNP3Daemon to invoke a non-existent system file and enter an indefinite restart loop. While the device remains partially…
When was CVE-2026-6889 disclosed?
CVE-2026-6889 was first published in the National Vulnerability Database on July 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-6889?
CVE-2026-6889 has a CVSS v3 base score of 6.9 (NVD).
How do I remediate CVE-2026-6889?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6889, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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