Security Alert: Cisco Security Updates – May 2026

Cisco has released security updates addressing multiple vulnerabilities across its products. The vulnerabilities may allow attackers to compromise affected systems, leading to unauthorized access or service disruption.

Affected products include but are not limited to:

• Cisco Catalyst SD-WAN Controller
• Cisco Catalyst SD-WAN Manager
• Cisco SG350 and SG350X Series Managed Switches
• Cisco Unity Connection 
• Cisco IoT Field Network Director Software

Security Risks

Successful exploitation of the identified Cisco product vulnerabilities presents a significant security risk, as it may allow attackers to gain unauthorized control over affected systems.

 For the full list of security patches released by Cisco, please refer to Cisco Security Advisories.

Recommended Actions

The National Cyber Security Authority (NCSA) recommends users and system administrators to:

• Follow and put in place the security updates shared by Cisco to lower the risk of vulnerability exploitation.
• Before updating or patching, please ensure that you have the latest backup that can easily be restored.

For further information and support, please contact the National Cyber Security Authority (NCSA) by email to rwcsirt@ncsa.gov.rw or call us on 9009.

References

• https://sec.cloudapps.cisco.com/security/center/publicationListing.x
• Cisco Security portal