CVE-2021-25663highCWE-835

CVE-2021-25663: high-severity vulnerability in Siemens Capital Embedded AR Classic 431-422

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21Vexday Risk Score

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

ssvc Trackcvss 8.7epss 1.9%
A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (All versions including affected IPv6 stack). The function that processes IPv6 headers does not check the lengths of extension header options, allowing attackers to put this function into an infinite loop with crafted length values.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
Siemens · Capital Embedded AR Classic 431-422Siemens · Capital Embedded AR Classic R20-11Siemens · Nucleus NETSiemens · Nucleus ReadyStart V3Siemens · Nucleus ReadyStart V4Siemens · Nucleus Source Code
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