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CVE-2019-1891

HIGHCVSS 7.5/10EPSS 1.77%

Last modified

CVE-2019-1891 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability in the web interface of Cisco Small Business 200, 300, and 500 Series 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 improper validation of requests sent to the web interface. EPSS estimates a 1.77% chance of exploitation in the next 30 days.

Description

A vulnerability in the web interface of Cisco Small Business 200, 300, and 500 Series 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 improper validation of requests sent to the web interface. An attacker could exploit this vulnerability by sending a malicious request to the web interface of an affected device. A successful exploit could allow the attacker to cause an unexpected reload of the device, resulting in a DoS condition.

Metrics

CVSS 3.0
7.5/10

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
1.77%

75.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoSf200-24 Firmware< 1.4.10.6
CiscoSf200-24p Firmware< 1.4.10.6
CiscoSf200-48 Firmware< 1.4.10.6
CiscoSf200-48p Firmware< 1.4.10.6
CiscoSg200-18 Firmware< 1.4.10.6
CiscoSg200-26 Firmware< 1.4.10.6
CiscoSg200-26p Firmware< 1.4.10.6
CiscoSg200-50 Firmware< 1.4.10.6
CiscoSg200-50p Firmware< 1.4.10.6
CiscoSg300-10 Firmware< 1.4.10.6
CiscoSg300-10mp Firmware< 1.4.10.6
CiscoSg300-10mpp Firmware< 1.4.10.6
CiscoSg300-10sfp Firmware< 1.4.10.6
CiscoSg300-10p Firmware< 1.4.10.6
CiscoSg300-10pp Firmware< 1.4.10.6
CiscoSg300-20 Firmware< 1.4.10.6
CiscoSg300-28 Firmware< 1.4.10.6
CiscoSg300-28p Firmware< 1.4.10.6
CiscoSg300-28pp Firmware< 1.4.10.6
CiscoSg300-28mp Firmware< 1.4.10.6
CiscoSg300-28sfp Firmware< 1.4.10.6
CiscoSg300-52 Firmware< 1.4.10.6
CiscoSg300-52p Firmware< 1.4.10.6
CiscoSg300-52mp Firmware< 1.4.10.6
CiscoSf300-08 Firmware< 1.4.10.6
CiscoSf302-08 Firmware< 1.4.10.6
CiscoSf302-08mp Firmware< 1.4.10.6
CiscoSf302-08p Firmware< 1.4.10.6
CiscoSf302-08pp Firmware< 1.4.10.6
CiscoSf302-08mpp Firmware< 1.4.10.6
CiscoSf300-24 Firmware< 1.4.10.6
CiscoSf300-24p Firmware< 1.4.10.6
CiscoSf300-24mp Firmware< 1.4.10.6
CiscoSf300-24pp Firmware< 1.4.10.6
CiscoSf300-48 Firmware< 1.4.10.6
CiscoSf300-48p Firmware< 1.4.10.6
CiscoSf300-48pp Firmware< 1.4.10.6
CiscoSf500-24 Firmware< 1.4.10.6
CiscoSf500-24p Firmware< 1.4.10.6
CiscoSf500-24mp Firmware< 1.4.10.6
CiscoSf500-48 Firmware< 1.4.10.6
CiscoSf500-48p Firmware< 1.4.10.6
CiscoSf500-48mp Firmware< 1.4.10.6
CiscoSg500-28 Firmware< 1.4.10.6
CiscoSg500-28p Firmware< 1.4.10.6
CiscoSg500-28mpp Firmware< 1.4.10.6
CiscoSg500-52 Firmware< 1.4.10.6
CiscoSg500-52p Firmware< 1.4.10.6
CiscoSg500-52mp Firmware< 1.4.10.6
CiscoSg500x-24 Firmware< 1.4.10.6

Showing 50 of 57 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-1891?
A vulnerability in the web interface of Cisco Small Business 200, 300, and 500 Series 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 improper validation of requests sent to the web interface. An attacker could exploit this vulnerability by sending a malicious request to the web interface of an affected device. A successful exploit could allow the attacker to cause an unexpected reload of the device, resulting in a DoS condition.
How severe is CVE-2019-1891?
CVE-2019-1891 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.77% probability of exploitation in the next 30 days.
How do I fix CVE-2019-1891?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST