CVE-2019-1814
A vulnerability in the interactions between the DHCP and TFTP features for Cisco Small Business 300 Series (Sx300) Managed Switches could allow an unauthenticated, remote attacker to cause the device to become low on system memory, which in turn could…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A vulnerability in the interactions between the DHCP and TFTP features for Cisco Small Business 300 Series (Sx300) Managed Switches could allow an unauthenticated, remote attacker to cause the device to become low on system memory, which in turn could lead to an unexpected reload of the device and result in a denial of service (DoS) condition on an affected device. The vulnerability is due to a failure to free system memory when an unexpected DHCP request is received. An attacker could exploit this vulnerability by sending a crafted DHCP packet to the targeted device. A successful exploit could allow the attacker to cause an unexpected reload of the device.
- CVSS 3.1
- 8.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- EPSS
- 2.13% probability · 82th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-400, CWE-770
- Affected
- cisco/sf302-08pp firmware · cisco/sf302-08mpp firmware · cisco/sg300-10pp firmware · cisco/sg300-10mpp firmware · cisco/sf300-24pp firmware · cisco/sf300-48pp firmware · cisco/sg300-28pp firmware · cisco/sf300-08 firmware · cisco/sf300-48p firmware · cisco/sg300-10mp firmware · cisco/sg300-10p firmware · cisco/sg300-10 firmware · cisco/sg300-28p firmware · cisco/sf300-24p firmware · cisco/sf302-08mp firmware · cisco/sg300-28 firmware · cisco/sf300-48 firmware · cisco/sg300-20 firmware · cisco/sf302-08p firmware · cisco/sg300-52 firmware · +7 more
- Source
- psirt@cisco.com
EPSS 2.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/108344Third Party Advisory, VDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb300sms-dhcpVendor Advisory
- http://www.securityfocus.com/bid/108344Third Party Advisory, VDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb300sms-dhcpVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.