A denial-of-service security issue exists in the affected products. The security issue stems from improper handling of exceptional conditions when processing crafted CIP packets sent to the adapter. A power cycle is required to recover the module and associated I/O.
CVE-2026-12659
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
- 16.6%
- KEV
- Not listed
Published
July 14, 2026
Last Modified
July 14, 2026
Advisory Details (1)
Auto-updated Jul 14, 2026No patch confirmed yet.
generic
SD1789 | Security Advisory | Rockwell Automation | US
https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1789.htmlVendor Advisories for CVE-2026-12659(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 15:25 UTCEG score recompute
- 2026-07-15 15:25 UTCGHSA enrichment
- 2026-07-15 03:33 UTCEG score recompute
- 2026-07-15 03:32 UTCGHSA enrichment
- 2026-07-14 15:41 UTCEG score recompute
- 2026-07-14 15:40 UTCMITRE cvelistV5first tracked
Frequently asked(5)
What is CVE-2026-12659?
CVE-2026-12659 is a high vulnerability published on July 14, 2026. A denial-of-service security issue exists in the affected products. The security issue stems from improper handling of exceptional conditions when processing crafted CIP packets sent to the adapter. A power cycle is required to recover the module and associated I/O.
When was CVE-2026-12659 disclosed?
CVE-2026-12659 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-2026-12659 actively exploited?
CVE-2026-12659 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12659?
CVE-2026-12659 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-2026-12659?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12659, 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-2026-12659
Is Your Infrastructure Affected by CVE-2026-12659?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.