CVE-2026-9622

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 76% of all CVEs by exploit prediction. 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: epss, secondary
Trending — 3 sources updated this week
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: 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 security issue exists within RSLinx® Classic. A crafted CIP packet targeting the Forward Close service can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity87% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 1, 2026

Advisory Details (1)

Auto-updated Sep 1, 2026
No patch confirmed yet.
generic

SD1794 | Security Advisory | Rockwell Automation | US

https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1794.html

Vendor Advisories for CVE-2026-9622(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 29× in last 7d / 77× 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. 2026-09-19 20:53 UTCEG score recompute
  2. 2026-09-19 20:53 UTCGHSA enrichment
  3. 2026-09-19 09:08 UTCGHSA enrichment
  4. 2026-09-18 21:25 UTCEG score recompute
  5. 2026-09-18 21:25 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 08:31 UTCGHSA enrichment
  8. 2026-09-17 20:48 UTCEG score recompute
  9. 2026-09-17 20:48 UTCGHSA enrichment
  10. 2026-09-17 19:32 UTCEPSS rescore
  11. 2026-09-17 09:05 UTCGHSA enrichment
  12. 2026-09-16 21:22 UTCEG score recompute
  13. 2026-09-16 21:22 UTCGHSA enrichment
  14. 2026-09-16 14:09 UTCEPSS rescore
  15. 2026-09-16 09:06 UTCEG score recompute
  16. 2026-09-16 09:06 UTCGHSA enrichment
  17. 2026-09-16 05:15 UTCEPSS rescore
  18. 2026-09-15 21:12 UTCGHSA enrichment
  19. 2026-09-15 09:29 UTCEG score recompute
  20. 2026-09-15 09:29 UTCGHSA enrichment
  21. 2026-09-15 03:12 UTCEPSS rescore
  22. 2026-09-14 21:46 UTCGHSA enrichment
  23. 2026-09-14 10:03 UTCGHSA enrichment
  24. 2026-09-13 22:19 UTCEG score recompute
  25. 2026-09-13 22:19 UTCGHSA enrichment
Show 52 more
  1. 2026-09-13 16:48 UTCEPSS rescore
  2. 2026-09-13 10:35 UTCGHSA enrichment
  3. 2026-09-12 22:52 UTCEG score recompute
  4. 2026-09-12 22:52 UTCGHSA enrichment
  5. 2026-09-12 15:02 UTCEPSS rescore
  6. 2026-09-12 11:08 UTCGHSA enrichment
  7. 2026-09-11 23:18 UTCEG score recompute
  8. 2026-09-11 23:18 UTCGHSA enrichment
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-11 11:03 UTCEG score recompute
  11. 2026-09-11 11:03 UTCGHSA enrichment
  12. 2026-09-11 09:38 UTCEPSS rescore
  13. 2026-09-10 23:20 UTCGHSA enrichment
  14. 2026-09-10 11:36 UTCEG score recompute
  15. 2026-09-10 11:36 UTCGHSA enrichment
  16. 2026-09-10 09:35 UTCEPSS rescore
  17. 2026-09-09 23:38 UTCGHSA enrichment
  18. 2026-09-09 11:08 UTCGHSA enrichment
  19. 2026-09-08 23:24 UTCEG score recompute
  20. 2026-09-08 23:24 UTCGHSA enrichment
  21. 2026-09-08 22:01 UTCEPSS rescore
  22. 2026-09-08 05:37 UTCGHSA enrichment
  23. 2026-09-07 17:49 UTCEG score recompute
  24. 2026-09-07 17:49 UTCGHSA enrichment
  25. 2026-09-07 06:05 UTCGHSA enrichment
  26. 2026-09-06 18:21 UTCEG score recompute
  27. 2026-09-06 18:21 UTCGHSA enrichment
  28. 2026-09-06 13:48 UTCEPSS rescore
  29. 2026-09-06 06:37 UTCGHSA enrichment
  30. 2026-09-05 18:54 UTCEG score recompute
  31. 2026-09-05 18:54 UTCGHSA enrichment
  32. 2026-09-05 15:31 UTCEPSS rescore
  33. 2026-09-05 07:10 UTCGHSA enrichment
  34. 2026-09-04 19:26 UTCEG score recompute
  35. 2026-09-04 19:26 UTCGHSA enrichment
  36. 2026-09-04 07:37 UTCEG score recompute
  37. 2026-09-04 07:36 UTCGHSA enrichment
  38. 2026-09-04 05:07 UTCEPSS rescore
  39. 2026-09-03 19:53 UTCGHSA enrichment
  40. 2026-09-03 08:09 UTCGHSA enrichment
  41. 2026-09-02 20:26 UTCEG score recompute
  42. 2026-09-02 20:26 UTCGHSA enrichment
  43. 2026-09-02 14:12 UTCEPSS rescore
  44. 2026-09-02 08:41 UTCGHSA enrichment
  45. 2026-09-01 20:58 UTCGHSA enrichment
  46. 2026-09-01 16:27 UTCEG score recompute
  47. 2026-09-01 16:26 UTCGHSA enrichment
  48. 2026-09-01 16:10 UTCEG score recompute
  49. 2026-09-01 16:10 UTCGHSA enrichment
  50. 2026-09-01 14:34 UTCEG score recompute
  51. 2026-09-01 13:46 UTCEG score recompute
  52. 2026-09-01 13:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-9622?
CVE-2026-9622 is a high vulnerability published on September 1, 2026. A denial-of-service security issue exists within RSLinx® Classic. A crafted CIP packet targeting the Forward Close service can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover.
When was CVE-2026-9622 disclosed?
CVE-2026-9622 was first published in the National Vulnerability Database on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9622 actively exploited?
CVE-2026-9622 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 75.8% of all scored CVEs.
What is the CVSS score of CVE-2026-9622?
CVE-2026-9622 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-9622?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9622, 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-2026-9622

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