Vulnerability Database

346,508

Total vulnerabilities in the database

CVE-2024-20263 — cisco / cbs250-8t-d_firmware

Improper Access Control

A vulnerability with the access control list (ACL) management within a stacked switch configuration of Cisco Business 250 Series Smart Switches and Business 350 Series Managed Switches could allow an unauthenticated, remote attacker to bypass protection offered by a configured ACL on an affected device. This vulnerability is due to incorrect processing of ACLs on a stacked configuration when either the primary or backup switches experience a full stack reload or power cycle. An attacker could exploit this vulnerability by sending crafted traffic through an affected device. A successful exploit could allow the attacker to bypass configured ACLs, causing traffic to be dropped or forwarded in an unexpected manner. The attacker does not have control over the conditions that result in the device being in the vulnerable state. Note: In the vulnerable state, the ACL would be correctly applied on the primary devices but could be incorrectly applied to the backup devices.

  • Published: Jan 26, 2024
  • Updated: Nov 16, 2025
  • CVE: CVE-2024-20263
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 5.8
  • AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Software From Fixed in
cisco / cbs250-8t-d_firmware 3.4 3.4.0.17
cisco / cbs250-8pp-d_firmware 3.4 3.4.0.17
cisco / cbs250-8t-e-2g_firmware 3.4 3.4.0.17
cisco / cbs250-8pp-e-2g_firmware 3.4 3.4.0.17
cisco / cbs250-8p-e-2g_firmware 3.4 3.4.0.17
cisco / cbs250-8fp-e-2g_firmware 3.4 3.4.0.17
cisco / cbs250-16t-2g_firmware 3.4 3.4.0.17
cisco / cbs250-16p-2g_firmware 3.4 3.4.0.17
cisco / cbs250-24t-4g_firmware 3.4 3.4.0.17
cisco / cbs250-24pp-4g_firmware 3.4 3.4.0.17
cisco / cbs250-24p-4g_firmware 3.4 3.4.0.17
cisco / cbs250-24fp-4g_firmware 3.4 3.4.0.17
cisco / cbs250-48t-4g_firmware 3.4 3.4.0.17
cisco / cbs250-48pp-4g_firmware 3.4 3.4.0.17
cisco / cbs250-48p-4g_firmware 3.4 3.4.0.17
cisco / cbs250-24t-4x_firmware 3.4 3.4.0.17
cisco / cbs250-24p-4x_firmware 3.4 3.4.0.17
cisco / cbs250-24fp-4x_firmware 3.4 3.4.0.17
cisco / cbs250-48t-4x_firmware 3.4 3.4.0.17
cisco / cbs250-48p-4x_firmware 3.4 3.4.0.17
cisco / cbs350-8t-e-2g_firmware 3.4 3.4.0.17
cisco / cbs350-8p-2g_firmware 3.4 3.4.0.17
cisco / cbs350-8p-e-2g_firmware 3.4 3.4.0.17
cisco / cbs350-8fp-2g_firmware 3.4 3.4.0.17
cisco / cbs350-8fp-e-2g_firmware 3.4 3.4.0.17
cisco / cbs350-8s-e-2g_firmware 3.4 3.4.0.17
cisco / cbs350-16t-2g_firmware 3.4 3.4.0.17
cisco / cbs350-16t-e-2g_firmware 3.4 3.4.0.17
cisco / cbs350-16p-2g_firmware 3.4 3.4.0.17
cisco / cbs350-16p-e-2g_firmware 3.4 3.4.0.17
cisco / cbs350-16fp-2g_firmware 3.4 3.4.0.17
cisco / cbs350-24t-4g_firmware 3.4 3.4.0.17
cisco / cbs350-24p-4g_firmware 3.4 3.4.0.17
cisco / cbs350-24fp-4g_firmware 3.4 3.4.0.17
cisco / cbs350-24s-4g_firmware 3.4 3.4.0.17
cisco / cbs350-48t-4g_firmware 3.4 3.4.0.17
cisco / cbs350-48p-4g_firmware 3.4 3.4.0.17
cisco / cbs350-48fp-4g_firmware 3.4 3.4.0.17
cisco / cbs350-24t-4x_firmware 3.4 3.4.0.17
cisco / cbs350-24p-4x_firmware 3.4 3.4.0.17
cisco / cbs350-24fp-4x_firmware 3.4 3.4.0.17
cisco / cbs350-48t-4x_firmware 3.4 3.4.0.17
cisco / cbs350-48p-4x_firmware 3.4 3.4.0.17
cisco / cbs350-48fp-4x_firmware 3.4 3.4.0.17
cisco / cbs350-8mgp-2x_firmware 3.4 3.4.0.17
cisco / cbs350-8mp-2x_firmware 3.4 3.4.0.17
cisco / cbs350-24mgp-4x_firmware 3.4 3.4.0.17
cisco / cbs350-12np-4x_firmware 3.4 3.4.0.17
cisco / cbs350-24ngp-4x_firmware 3.4 3.4.0.17
cisco / cbs350-48ngp-4x_firmware 3.4 3.4.0.17
cisco / cbs350-8xt_firmware 3.4 3.4.0.17
cisco / cbs350-12xs_firmware 3.4 3.4.0.17
cisco / cbs350-12xt_firmware 3.4 3.4.0.17
cisco / cbs350-16xts_firmware 3.4 3.4.0.17
cisco / cbs350-24xs_firmware 3.4 3.4.0.17
cisco / cbs350-24xt_firmware 3.4 3.4.0.17
cisco / cbs350-24xts_firmware 3.4 3.4.0.17
cisco / cbs350-48xt-4x_firmware 3.4 3.4.0.17
cisco / cbs250-8t-d_firmware 2.5 2.5.9.54
cisco / cbs250-8pp-d_firmware 2.5 2.5.9.54
cisco / cbs250-8t-e-2g_firmware 2.5 2.5.9.54
cisco / cbs250-8pp-e-2g_firmware 2.5 2.5.9.54
cisco / cbs250-8p-e-2g_firmware 2.5 2.5.9.54
cisco / cbs250-8fp-e-2g_firmware 2.5 2.5.9.54
cisco / cbs250-16t-2g_firmware 2.5 2.5.9.54.x
cisco / cbs250-16p-2g_firmware 2.5 2.5.9.54
cisco / cbs250-24t-4g_firmware 2.5 2.5.9.54
cisco / cbs250-24pp-4g_firmware 2.5 2.5.9.54
cisco / cbs250-24p-4g_firmware 2.5 2.5.9.54
cisco / cbs250-24fp-4g_firmware 2.5 2.5.9.54
cisco / cbs250-48t-4g_firmware 2.5 2.5.9.54
cisco / cbs250-48pp-4g_firmware 2.5 2.5.9.54
cisco / cbs250-48p-4g_firmware 2.5 2.5.9.54
cisco / cbs250-24t-4x_firmware 2.5 2.5.9.54
cisco / cbs250-24p-4x_firmware 2.5 2.5.9.54
cisco / cbs250-24fp-4x_firmware 2.5 2.5.9.54
cisco / cbs250-48t-4x_firmware 2.5 2.5.9.54
cisco / cbs250-48p-4x_firmware 2.5 2.5.9.54
cisco / cbs350-8t-e-2g_firmware 2.5 2.5.9.54
cisco / cbs350-8p-2g_firmware 2.5 2.5.9.54
cisco / cbs350-8p-e-2g_firmware 2.5 2.5.9.54
cisco / cbs350-8fp-2g_firmware 2.5 2.5.9.54
cisco / cbs350-8fp-e-2g_firmware 2.5 2.5.9.54
cisco / cbs350-8s-e-2g_firmware 2.5 2.5.9.54
cisco / cbs350-16t-2g_firmware 2.5 2.5.9.54
cisco / cbs350-16t-e-2g_firmware 2.5 2.5.9.54
cisco / cbs350-16p-2g_firmware 2.5 2.5.9.54
cisco / cbs350-16p-e-2g_firmware 2.5 2.5.9.54
cisco / cbs350-16fp-2g_firmware 2.5 2.5.9.54
cisco / cbs350-24t-4g_firmware 2.5 2.5.9.54
cisco / cbs350-24p-4g_firmware 2.5 2.5.9.54
cisco / cbs350-24fp-4g_firmware 2.5 2.5.9.54
cisco / cbs350-24s-4g_firmware 2.5 2.5.9.54
cisco / cbs350-48t-4g_firmware 2.5 2.5.9.54
cisco / cbs350-48p-4g_firmware 2.5 2.5.9.54
cisco / cbs350-48fp-4g_firmware 2.5 2.5.9.54
cisco / cbs350-24t-4x_firmware 2.5 2.5.9.54
cisco / cbs350-24p-4x_firmware 2.5 2.5.9.54
cisco / cbs350-24fp-4x_firmware 2.5 2.5.9.54
cisco / cbs350-48t-4x_firmware 2.5 2.5.9.54
cisco / cbs350-48p-4x_firmware 2.5 2.5.9.54
cisco / cbs350-48fp-4x_firmware 2.5 2.5.9.54
cisco / cbs350-8mgp-2x_firmware 2.5 2.5.9.54
cisco / cbs350-8mp-2x_firmware 2.5 2.5.9.54
cisco / cbs350-24mgp-4x_firmware 2.5 2.5.9.54
cisco / cbs350-12np-4x_firmware 2.5 2.5.9.54
cisco / cbs350-24ngp-4x_firmware 2.5 2.5.9.54
cisco / cbs350-48ngp-4x_firmware 2.5 2.5.9.54
cisco / cbs350-8xt_firmware 2.5 2.5.9.54
cisco / cbs350-12xs_firmware 2.5 2.5.9.54
cisco / cbs350-12xt_firmware 2.5 2.5.9.54
cisco / cbs350-16xts_firmware 2.5 2.5.9.54
cisco / cbs350-24xs_firmware 2.5 2.5.9.54
cisco / cbs350-24xt_firmware 2.5 2.5.9.54
cisco / cbs350-24xts_firmware 2.5 2.5.9.54
cisco / cbs350-48xt-4x_firmware 2.5 2.5.9.54
cisco / sg350xg-2f10_firmware 2.5 2.5.9.54
cisco / sg350xg-24f_firmware 2.5 2.5.9.54
cisco / sg350xg-24t_firmware 2.5 2.5.9.54
cisco / sg350xg-48t_firmware 2.5 2.5.9.54
cisco / sg350x-24_firmware 2.5 2.5.9.54
cisco / sg350x-24p_firmware 2.5 2.5.9.54
cisco / sg350x-24mp_firmware 2.5 2.5.9.54
cisco / sg350x-48_firmware 2.5 2.5.9.54
cisco / sg350x-48p_firmware 2.5 2.5.9.54
cisco / sg350x-48mp_firmware 2.5 2.5.9.54
cisco / sg550xg-8f8t_firmware 2.5 2.5.9.54
cisco / sg550xg-24f_firmware 2.5 2.5.9.54
cisco / sg550xg-24t_firmware 2.5 2.5.9.54
cisco / sg550x-48t_firmware 2.5 2.5.9.54
cisco / sg550x-24_firmware 2.5 2.5.9.54
cisco / sg550x-24p_firmware 2.5 2.5.9.54
cisco / sg550x-24mp_firmware 2.5 2.5.9.54
cisco / sg550x-24mpp_firmware 2.5 2.5.9.54
cisco / sg550x-48_firmware 2.5 2.5.9.54
cisco / sg550x-48p_firmware 2.5 2.5.9.54
cisco / sg550x-48mp_firmware 2.5 2.5.9.54
cisco / sf550x-24_firmware 2.5 2.5.9.54
cisco / sf550x-24p_firmware 2.5 2.5.9.54
cisco / sf550x-24mp_firmware 2.5 2.5.9.54
cisco / sf550x-48_firmware 2.5 2.5.9.54
cisco / sf550x-48p_firmware 2.5 2.5.9.54
cisco / sf550x-48mp_firmware 2.5 2.5.9.54

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.