CVE-2021-1596: Cisco Video Surveillance 7000 Series IP Cameras Link Layer Discovery Protocol Memory Leak Vulnerabilities

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: 2021-07-08 · updated 2026-06-17
Weakness: CWE-401

Description

Multiple vulnerabilities in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Video Surveillance 7000 Series IP Cameras could allow an unauthenticated, adjacent attacker to cause a memory leak, which could lead to a denial of service (DoS) condition on an affected device. These vulnerabilities are due to incorrect processing of certain LLDP packets at ingress time. An attacker could exploit these vulnerabilities by sending crafted LLDP packets to an affected device. A successful exploit could allow the attacker to cause the affected device to continuously consume memory, which could cause the device to crash and reload, resulting in a DoS condition. Note: LLDP is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).

Affected products

Cisco Video Surveillance 7070 Firmware: before 2.12.4 — fixed in 2.12.4
Cisco Video Surveillance 7530Pd Firmware: before 2.12.4 — fixed in 2.12.4

How to fix

Upgrade to a fixed version: Cisco Video Surveillance 7070 Firmware 2.12.4; Cisco Video Surveillance 7530Pd Firmware 2.12.4. Check the vendor advisory for mitigations.

References

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