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Vulnerability record · CVE-2023-20159 · published 18 May 2023

CVE-2023-20159: Cisco business 250-16p-2g firmware classic buffer overflow vulnerability

Cisco · Business 250 16p 2g Firmware

Multiple vulnerabilities in the web-based user interface of certain Cisco Small Business Series Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or execute arbitrary code with root privileges on an affected device. These vulnerabilities are due to improper validation of requests that are sent to the web interface. For more information about these vulnerabilities, see the Details section of this advisory.

9.8 CVSS 3.1 Critical EPSS 10% · top 4.5% CWE-120 · Classic buffer overflow
9.8CVSS 3.1 base score
10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
150Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Multiple vulnerabilities in the web-based user interface of certain Cisco Small Business Series Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or execute arbitrary code with root privileges on an affected device. These vulnerabilities are due to improper validation of requests that are sent to the web interface. For more information about these vulnerabilities, see the Details section of this advisory.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

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

References

LinkTags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sg-web-multi-S9g4Nkgv Vendor Advisory
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sg-web-multi-S9g4Nkgv Vendor Advisory

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Related vulnerabilities

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

9.8CVE-2023-20189Cisco business 250-16p-2g firmware classic buffer overflow vulnerabilityMultiple vulnerabilities in the web-based user interface of certain Cisco Small Business Series Switches could allow an unauthenticated, remote attac…EPSS 11%9.8CVE-2023-20157Cisco business 250-16p-2g firmware classic buffer overflow vulnerabilityMultiple vulnerabilities in the web-based user interface of certain Cisco Small Business Series Switches could allow an unauthenticated, remote attac…EPSS 1.2%9.8CVE-2023-20158Cisco business 250-16p-2g firmware classic buffer overflow vulnerabilityMultiple vulnerabilities in the web-based user interface of certain Cisco Small Business Series Switches could allow an unauthenticated, remote attac…EPSS 1.2%9.8CVE-2023-20160Cisco business 250-16p-2g firmware classic buffer overflow vulnerabilityMultiple vulnerabilities in the web-based user interface of certain Cisco Small Business Series Switches could allow an unauthenticated, remote attac…EPSS 10%9.8CVE-2023-20161Cisco business 250-16p-2g firmware classic buffer overflow vulnerabilityMultiple vulnerabilities in the web-based user interface of certain Cisco Small Business Series Switches could allow an unauthenticated, remote attac…EPSS 10%9.8CVE-2023-20162Cisco business 250-16p-2g firmware classic buffer overflow vulnerabilityMultiple vulnerabilities in the web-based user interface of certain Cisco Small Business Series Switches could allow an unauthenticated, remote attac…EPSS 1.2%9.8CVE-2023-20156Cisco business 250-16p-2g firmware classic buffer overflow vulnerabilityMultiple vulnerabilities in the web-based user interface of certain Cisco Small Business Series Switches could allow an unauthenticated, remote attac…EPSS 1.2%7.5CVE-2023-20024Cisco business 250-16p-2g firmware classic buffer overflow vulnerabilityMultiple vulnerabilities in the web-based user interface of certain Cisco Small Business Series Switches could allow an unauthenticated, remote attac…EPSS 1.3%

Source: NIST National Vulnerability Database (record CVE-2023-20159), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.