CVE-2021-1521
6.5 · MEDIUMOverview
CVE-2021-1521 is a medium-severity vulnerability affecting cisco video_surveillance_8400_firmware. It was published on May 6, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
A vulnerability in the Cisco Discovery Protocol implementation for Cisco Video Surveillance 8000 Series IP Cameras could allow an unauthenticated, adjacent attacker to cause an affected IP camera to reload. This vulnerability is due to missing checks when processing Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected IP camera. A successful exploit could allow the attacker to cause the affected IP camera to reload unexpectedly, resulting in a denial of service (DoS) condition. Note: Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
Remediation
Check the references section for vendor advisories and patches from cisco. Update video_surveillance_8400_firmware 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 | video_surveillance_8400_firmware | >= 0, < 1.0.9-11 | Affected |
| cisco | video_surveillance_8000p_firmware | >= 0, < 1.0.9-11 | Affected |
| cisco | video_surveillance_8020_firmware | >= 0, < 1.0.9-11 | Affected |
| cisco | video_surveillance_8030_firmware | >= 0, < 1.0.9-11 | Affected |
| cisco | video_surveillance_8070_firmware | >= 0, < 1.0.9-11 | Affected |
| cisco | video_surveillance_8620_firmware | >= 0, < 1.0.9-11 | Affected |
| cisco | video_surveillance_8630_firmware | >= 0, < 1.0.9-11 | Affected |
| cisco | video_surveillance_8930_firmware | >= 0, < 1.0.9-11 | Affected |
Frequently Asked Questions
What is CVE-2021-1521?
CVE-2021-1521 is a medium-severity vulnerability affecting cisco video_surveillance_8400_firmware. It was published on May 6, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
How severe is CVE-2021-1521?
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-1521?
Check the references section for vendor advisories and patches from cisco. Update video_surveillance_8400_firmware 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-2021-1521?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-1521 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.
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