CVE-2019-1736
6.6 · MEDIUMOverview
CVE-2019-1736 is a medium-severity vulnerability affecting cisco fmc1000-k9_bios. It was published on September 23, 2020 and has a CVSS 3.1 base score of 6.6 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.6, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
A vulnerability in the firmware of the Cisco UCS C-Series Rack Servers could allow an authenticated, physical attacker to bypass Unified Extensible Firmware Interface (UEFI) Secure Boot validation checks and load a compromised software image on an affected device. The vulnerability is due to improper validation of the server firmware upgrade images. An attacker could exploit this vulnerability by installing a server firmware version that would allow the attacker to disable UEFI Secure Boot. A successful exploit could allow the attacker to bypass the signature validation checks that are done by UEFI Secure Boot technology and load a compromised software image on the affected device. A compromised software image is any software image that has not been digitally signed by Cisco.
Remediation
Check the references section for vendor advisories and patches from cisco. Update fmc1000-k9_bios to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| cisco | fmc1000-k9_bios | >= 0, < 4.0.1f.0 | Affected |
| cisco | fmc1000-k9_firmware | >= 0, < 4.0.2h | Affected |
| cisco | fmc2500-k9_bios | >= 0, < 4.0.1f.0 | Affected |
| cisco | fmc2500-k9_firmware | >= 0, < 4.0.2h | Affected |
| cisco | fmc4500-k9_bios | >= 0, < 4.0.1f.0 | Affected |
| cisco | fmc4500-k9_firmware | >= 0, < 4.0.2h | Affected |
| cisco | sns-3515-k9_bios | >= 0, < 4.0.2d | Affected |
| cisco | sns-3515-k9_firmware | >= 0, < 4.0.2h | Affected |
| cisco | sns-3595-k9_bios | >= 0, < 4.0.2d | Affected |
| cisco | sns-3595-k9_firmware | >= 0, < 4.0.2h | Affected |
| cisco | sns-3615-k9_bios | >= 0, < 4.0.1i | Affected |
| cisco | sns-3615-k9_firmware | >= 0, < 4.0.1g | Affected |
| cisco | sns-3655-k9_bios | >= 0, < 4.0.1i | Affected |
| cisco | sns-3655-k9_firmware | >= 0, < 4.0.1g | Affected |
| cisco | sns-3695-k9_bios | >= 0, < 4.0.1i | Affected |
| cisco | sns-3695-k9_firmware | >= 0, < 4.0.1g | Affected |
| cisco | tg5004-k9_bios | >= 0, < 4.0.2d | Affected |
| cisco | tg5004-k9_firmware | >= 0, < 4.0.2h | Affected |
| cisco | tg5004-k9-rf_bios | >= 0, < 4.0.2d | Affected |
| cisco | tg5004-k9-rf_firmware | >= 0, < 4.0.2h | Affected |
Frequently Asked Questions
What is CVE-2019-1736?
CVE-2019-1736 is a medium-severity vulnerability affecting cisco fmc1000-k9_bios. It was published on September 23, 2020 and has a CVSS 3.1 base score of 6.6 (MEDIUM).
How severe is CVE-2019-1736?
This vulnerability has a CVSS 3.1 base score of 6.6, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2019-1736?
Check the references section for vendor advisories and patches from cisco. Update fmc1000-k9_bios to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2019-1736?
CyberStrike's AI-powered security agents can automatically detect CVE-2019-1736 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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