What’s Vulnerable › Vulnerabilities
CVE-2021-1521: Cisco Video Surveillance 8000 Series IP Cameras Cisco Discovery Protocol Denial of Service Vulnerability
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-05-06 · updated 2026-06-17
- Weakness: CWE-119
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).
Affected products
- Cisco Video Surveillance 8000P Firmware: before 1.0.9-11 — fixed in 1.0.9-11
- Cisco Video Surveillance 8020 Firmware: before 1.0.9-11 — fixed in 1.0.9-11
- Cisco Video Surveillance 8030 Firmware: before 1.0.9-11 — fixed in 1.0.9-11
- Cisco Video Surveillance 8070 Firmware: before 1.0.9-11 — fixed in 1.0.9-11
- Cisco Video Surveillance 8400 Firmware: before 1.0.9-11 — fixed in 1.0.9-11
- Cisco Video Surveillance 8620 Firmware: before 1.0.9-11 — fixed in 1.0.9-11
- Cisco Video Surveillance 8630 Firmware: before 1.0.9-11 — fixed in 1.0.9-11
- Cisco Video Surveillance 8930 Firmware: before 1.0.9-11 — fixed in 1.0.9-11
How to fix
Upgrade to a fixed version: Cisco Video Surveillance 8000P Firmware 1.0.9-11; Cisco Video Surveillance 8020 Firmware 1.0.9-11; Cisco Video Surveillance 8030 Firmware 1.0.9-11; Cisco Video Surveillance 8070 Firmware 1.0.9-11; Cisco Video Surveillance 8400 Firmware 1.0.9-11; Cisco Video Surveillance 8620 Firmware 1.0.9-11; Cisco Video Surveillance 8630 Firmware 1.0.9-11; Cisco Video Surveillance 8930 Firmware 1.0.9-11. Check the vendor advisory for mitigations.
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipcameras-dos-fc3F6LzT
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipcameras-dos-fc3F6LzT
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