CVE-2021-21005highCWE-362

CVE-2021-21005: high-severity vulnerability in Phoenix Contact FL SWITCH

Race Condition Vulnerability in Phoenix Contact FL SWITCH SMCS series products

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 0.7%
In Phoenix Contact FL SWITCH SMCS series products in multiple versions if an attacker sends a hand-crafted TCP-Packet with the Urgent-Flag set and the Urgent-Pointer set to 0, the network stack will crash. The device needs to be rebooted afterwards.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Phoenix Contact · FL NATPhoenix Contact · FL SWITCH
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In the same product, most dangerous first.

CVE-2021-21003MEDIUMDenial of Service Vulnerability in Phoenix Contact FL SWITCH SMCS series productsEPSS 0.9%CVE-2021-21004HIGHCross-site Scripting Vulnerability in Phoenix Contact FL SWITCH SMCS series productsEPSS 0.6%