What’s Vulnerable › Vulnerabilities
CVE-2024-20397: Cisco NX-OS Software Image Verification Bypass Vulnerability
- Severity: medium (CVSS 5.2 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2024-12-04 · updated 2026-06-17
- Weakness: CWE-284
Description
A vulnerability in the bootloader of Cisco NX-OS Software could allow an unauthenticated attacker with physical access to an affected device, or an authenticated, local attacker with administrative credentials, to bypass NX-OS image signature verification. This vulnerability is due to insecure bootloader settings. An attacker could exploit this vulnerability by executing a series of bootloader commands. A successful exploit could allow the attacker to bypass NX-OS image signature verification and load unverified software.
Affected products
- Cisco NX-OS: 8.2(5), 7.3(5)D1(1), 8.4(2), 8.4(3), 9.2(3), 7.0(3)I5(2) (+304)
- Cisco Unified Computing System (Managed): 4.0(4c), 4.0(2b), 4.1(2a), 4.0(1a), 4.0(2a), 4.0(1b) (+65)
References
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