CVE-2026-9624

highpriority · track · 0EPSS 0.004 · 37 %ileUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.43% (37th) EPSS

CVSS 7.5 · high

Is it mine?

2 products

Check your exposure

Who says so?

1 sources

cisa_csaf_ot

EPSS · scored 2026-10-27

A denial-of-service security issue exists within RSLinx® Classic. A crafted CIP packet can cause the RSLinx® Classic service to crash due to insufficient data length validation, requiring a restart of the service to recover.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedRSLinx Classiccisa_csaf_ot
Rockwell Automation has corrected the vulnerabilities in RSLinx Classic version 4.60.
MitigationRSLinx Classiccisa_csaf_ot
Users using the affected software, who are not able to upgrade to one of the corrected versions, should use Rockwell Automation's security best practices https://support.rockwellautomation.com/app/answers/answer_view/a_id/1085012/loc/en_US#__highlight.
https://support.rockwellautomation.com/app/answers/answer_view/a_id/1085012/loc/en_US#__highlight

cvss

Technical severity, 0–10. One row per scoring source.

8.7

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–8.7

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · CISA US

v4.08.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · PSIRT@rockwellautomation.com

v4.06.6mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-191USCWE-191US

affected products (2)

Products and version ranges known to be affected.

Rockwell Automation RSLinx Classic: <=4.50all versionscisa_csaf_otUS
Rockwell Automation RSLinx Classic≤ 4.50cisa_csaf_otUS

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-26-244-01Rockwell Automation RSLinx Classic2026-09-01icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could allow an attacker to cause a denial-of-service condition on the affected product.

sources

Which sources assert this record, and when.

cisa_csaf_ot NVD CVE.org MITRE

published 2026-09-01modified 2026-09-01

references (1) nvd

External citations — patches, advisories, analysis.

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

scry

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