CVE-2020-3496: Cisco SF200-24 Firmware
Medium severity, CVSS 5.3. EPSS: 1.7% chance of exploitation in the next 30 days.
A vulnerability in the IPv6 packet processing engine of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient validation of incoming IPv6 traffic. An attacker could exploit this vulnerability by sending a crafted IPv6 packet through an affected device. A successful exploit could allow the attacker to cause the switch management CLI to stop responding, resulting in a DoS condition. This vulnerability is specific to IPv6 traffic. IPv4 traffic is not affected.
Affected products
- Cisco SF200-24 Firmware: up to and including 2.5.5.47
- Cisco SF200-24fp Firmware: up to and including 2.5.5.47
- Cisco SF200-24p Firmware: up to and including 2.5.5.47
- Cisco SF200-48 Firmware: up to and including 2.5.5.47
- Cisco SF200-48p Firmware: up to and including 2.5.5.47
- Cisco SF250-24 Firmware: up to and including 2.5.5.47
- Cisco SF250-24p Firmware: up to and including 2.5.5.47
- Cisco SF250-48 Firmware: up to and including 2.5.5.47
- Cisco SF250-48hp Firmware: up to and including 2.5.5.47
- Cisco SF300-08 Firmware: up to and including 2.5.5.47
- Cisco SF300-24 Firmware: up to and including 2.5.5.47
- Cisco SF300-24mp Firmware: up to and including 2.5.5.47
- Cisco SF300-24p Firmware: up to and including 2.5.5.47
- Cisco SF300-24pp Firmware: up to and including 2.5.5.47
- Cisco SF300-48 Firmware: up to and including 2.5.5.47
- Cisco SF300-48p Firmware: up to and including 2.5.5.47
- Cisco SF300-48pp Firmware: up to and including 2.5.5.47
- Cisco SF302-08 Firmware: up to and including 2.5.5.47
- Cisco SF302-08mp Firmware: up to and including 2.5.5.47
- Cisco SF302-08mpp Firmware: up to and including 2.5.5.47
- Cisco SF302-08p Firmware: up to and including 2.5.5.47
- Cisco SF302-08pp Firmware: up to and including 2.5.5.47
- Cisco SF350-48 Firmware: up to and including 2.5.5.47
- Cisco SF350-48mp Firmware: up to and including 2.5.5.47
- Cisco SF350-48p Firmware: up to and including 2.5.5.47
- and 89 more
Published 2020-08-26. Last modified 2026-06-17.