THREATPORT/VULNERABILITY/CVE-2018-14821
HIGH SEVERITY

CVE-2018-14821

Rslinx vulnerability

CVSS
7.5
EPSS
4.5%
EPSS pct
90th
Exploited
No known
Rockwell Automation RSLinx Classic Versions 4.00.01 and prior. This vulnerability may allow a remote, unauthenticated threat actor to intentionally send a malformed CIP packet to Port 44818, causing the RSLinx Classic application to terminate. The user will need to manually restart the software to regain functionality.
Affected vendor
Rockwellautomation
Affected product
Rslinx
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
  • CWE-122 — Heap-based Buffer Overflow
  • CWE-119 — Improper Restriction of Operations within Memory Bounds
Published
2018-09-20

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 4.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 90% of all scored CVEs.

Check your external exposure to CVE-2018-14821

  • Confirm whether Rockwellautomation Rslinx is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2018-14821.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-14821

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-14821 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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