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Fencer Intel
high 7.5

CVE-2020-5801 in the critical feed json

An attacker can craft and send an OpenNamespace message to port 4241 with valid session-id that triggers an unhandled exception in CFTLDMan…

published 5y ago modified 4mo ago also EUVD-2020-26958

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
29.7%
EPSS 29.7% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

An attacker can craft and send an OpenNamespace message to port 4241 with valid session-id that triggers an unhandled exception in CFTLDManager::HandleRequest function in RnaDaSvr.dll, resulting in process termination. Observed in FactoryTalk Linx 6.11. All versions of FactoryTalk Linx are affected.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-028-01 updated cvss 7.5

Rockwell Automation FactoryTalk Linx and FactoryTalk Services Platform

  • Rockwell Automation FactoryTalk Linx software <= 6.20
    affected: mitigation “Rockwell Automation published PN1540 to inform users of the risk of these vulnerabilities and instruct users on the proper use of patches.” rockwellautomation.custhelp.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

29.66% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • n/a Rockwell FactoryTalk Linx

Classification

Weakness
  • CWE-755 Improper Handling of Exceptional Conditions

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.