Search/CVE-2021-25663
● CVE — High

CVE-2021-25663

VendorsiemensProductcapital vstar, nucleus net, nucleus readystart, nucleus source codeDiscoveredApr 22, 2021UpdatedMar 11, 2025

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.

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CVSS v3.1
7.5 HIGH
EPSS
1.88%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityNONE
IntegrityNONE
AvailabilityHIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Connections
5 relationships
Timeline
disclosure → media coverage
Apr 22, 2021
Disclosure — published as a CVE record. · last revised by NVD Mar 11, 2025