High severity · published Oct 22, 2026
CVE-2026-66279
Dis-connect vulnerability in Connect Stack
New
7.2
CVSS
0.2%
EPSS
No
On KEV
Description
In Connect SDK 4.3.1 and earlier and Flex SDK 3.7.7 and earlier, a message with invalid security settings may bypass authentication resulting in network disruption. This vulnerability does not allow an attacker to gain the Network Key or otherwise break confidentiality.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CS
Connect SDK · Silicon Labs
4.0.0 through 4.3.1; through 3.7.7 · source: vendor