CVE-2021-25663

HIGH 7.5CVE-2021-25663 · Published 22/04/2021 · updated 17/06/2026

In short

CVE-2021-25663 is a HIGH (CVSS 7.5) vulnerability affecting nucleus readystart (siemens).
Chance of exploitation in the next 30 days (EPSS): 1.9%, higher than 79.6% of all vulnerabilities.
Fix: update to 2017.02.4, 4.1.0 or later.

Package	Affected versions	Patched versions
nucleus readystart siemens	`< 2017.02.4< 4.1.0`	`2017.02.44.1.0`

Description

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.

References

cert-portal.siemens.com/productcert/html/ssa-248289.html
cert-portal.siemens.com/productcert/pdf/ssa-248289.pdf · Vendor Advisory
us-cert.cisa.gov/ics/advisories/icsa-21-103-05 · Third Party Advisory

CVE-2021-25663

In short

Description

References

More vulnerabilities in nucleus readystart

CVE-2021-25663

In short

Description

References

More vulnerabilities in nucleus readystart