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Vulnerability record · CVE-2019-1814 · published 16 May 2019

CVE-2019-1814: Cisco sf302-08pp firmware uncontrolled resource consumption vulnerability

Cisco · Sf302 08pp Firmware

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.

8.6 CVSS 3.1 High EPSS 2.1% · top 18.7% CWE-400 · Uncontrolled resource consumptionCWE-770 · Allocation without limits
8.6CVSS 3.1 base score, v2 5.0
2.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
27Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Affected products

27 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/108344 Third Party AdvisoryVDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb300sms-dhcp Vendor Advisory
http://www.securityfocus.com/bid/108344 Third Party AdvisoryVDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb300sms-dhcp Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-1814), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.