CVE-2020-5801
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 29.7%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 29.66% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-755
- Affected
- rockwellautomation/factorytalk linx
- Source
- vulnreport@tenable.com
EPSS moved from 29.7% on 15 October 2026 to 29.7% on 3 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- https://www.tenable.com/security/research/tra-2020-71Third Party Advisory
- https://www.tenable.com/security/research/tra-2020-71Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.