A denial-of-service security issue exists across all the 1756-EN2, EN3, and ENBT communication module due to improper validation of CIP Implicit Connection packets. An attacker on the network can exploit this by sending crafted packets to continuously disrupt device connections, though device connections will recover immediately after.
CVE-2026-9653
HIGHPre-NVD 8.78.7Trending — 4 sources updated this week
EchelonGraph scoreLOW confidence
This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: secondary
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.7Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.7
- EG Score
- 8.7(low)
- EPSS
- 7.5%
- KEV
- Not listed
Published
July 14, 2026
Last Modified
July 14, 2026
Advisory Details (1)
Auto-updated Jul 14, 2026No patch confirmed yet.
generic
SD1780 | Security Advisory | Rockwell Automation | US
https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1780.htmlVendor Advisories for CVE-2026-9653(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× 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.
- 2026-07-15 16:57 UTCEPSS rescore
- 2026-07-15 16:11 UTCEG score recompute
- 2026-07-15 16:11 UTCGHSA enrichment
- 2026-07-15 03:39 UTCEG score recompute
- 2026-07-15 03:38 UTCGHSA enrichment
- 2026-07-14 15:06 UTCEG score recompute
- 2026-07-14 15:05 UTCMITRE cvelistV5first tracked
Frequently asked(5)
What is CVE-2026-9653?
CVE-2026-9653 is a high vulnerability published on July 14, 2026. A denial-of-service security issue exists across all the 1756-EN2, EN3, and ENBT communication module due to improper validation of CIP Implicit Connection packets. An attacker on the network can exploit this by sending crafted packets to continuously disrupt device connections, though device…
When was CVE-2026-9653 disclosed?
CVE-2026-9653 was first published in the National Vulnerability Database on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9653 actively exploited?
CVE-2026-9653 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9653?
CVE-2026-9653 has a CVSS v3 base score of 8.7 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-9653?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9653, 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
Explore the affected products and dependency analysis for CVE-2026-9653
Is Your Infrastructure Affected by CVE-2026-9653?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.