CVE-2019-1814

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

2.1% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2019-05-16 00:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 02:29 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.1% in the next 30 days (EPSS).
• Severity: 8.6 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2019-05-16 00:29 UTC

Last modified

2026-06-17 02:29 UTC

Exploit probability

2.1% · EPSS, next 30 days

Weakness

CWE-400 · Uncontrolled resource consumption

Record status

Modified

Affected

• Cisco sf302-08pp Firmware < 1.4.10.6
• Cisco sf302-08mpp Firmware < 1.4.10.6
• Cisco sg300-10pp Firmware < 1.4.10.6
• Cisco sg300-10mpp Firmware < 1.4.10.6
• Cisco sf300-24pp Firmware < 1.4.10.6
• Cisco sf300-48pp Firmware < 1.4.10.6
• Cisco sg300-28pp Firmware < 1.4.10.6
• Cisco sf300-08 Firmware < 1.4.10.6

Attack profile CVSS 3.1 · 8.6

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2019-1814.md and follow it. Check whether this project is affected by CVE-2019-1814. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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