CVE-2021-25663 is a high-severity vulnerability affecting Siemens Capital Embedded AR Classic and Nucleus products, including Nucleus NET and Nucleus ReadyStart. It stems from an unchecked length value in the IPv6 header processing function, allowing an attacker to trigger an infinite loop via a crafted IPv6 packet. This denial-of-service vulnerability has a CVSS score of 7.5, indicating a network-exploitable attack with low complexity and high availability impact. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:siemens:capital_vstar:-:*:*:*:*:*:*:* | ||
All Versions ImpactedCPE matchmatch criteria | cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:* | ||
< 4.1.0CPE matchmatch criteria | cpe:2.3:a:siemens:nucleus_readystart:*:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:siemens:nucleus_source_code:-:*:*:*:*:*:*:* | ||
< 2017.02.4CPE matchmatch criteria | cpe:2.3:a:siemens:nucleus_readystart:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.