CVE intelligence and bounded remediation

CVE-2020-3260 — Cisco Aironet 1542I Firmware security vulnerability

High CVSS 7.4

A vulnerability in Cisco Aironet Series Access Points Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to the improper processing of client packets that are sent to an affected access point (AP). An attacker could exploit this vulnerability by sending a large number of sustained client packets to the affected AP. A successful exploit could allow the attacker to cause the affected AP to crash, resulting in a DoS condition.

Severity
High
CVSS
7.4 (3.0)
Published
2020-04-15
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-399, CWE-400

Affected products

  • cisco / aironet_1542i_firmware / 8.9(100.0)
  • cisco / aironet_1542d_firmware / 8.9(100.0)
  • cisco / aironet_1815_firmware / 8.9(100.0)
  • cisco / aironet_1830_firmware / 8.9(100.0)
  • cisco / aironet_1840_firmware / 8.9(100.0)
  • cisco / aironet_1850_firmware / 8.9(100.0)

Matched remediation archetype

Resource exhaustion and denial of service

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Identify attacker-influenced work factors including input size, nesting, compression, fan-out, regex cost, allocation, recursion, retries, and connection lifetime.
  • Map per-request and shared CPU, memory, disk, descriptor, thread, queue, and downstream-service limits.
  • Determine whether authentication, tenancy, quotas, and rate controls apply before expensive processing begins.

Remediate safely

  • Bound input size, nesting, expansion, work, concurrency, queue depth, retries, and execution time before resource-intensive processing.
  • Release resources on every success, error, cancellation, and timeout path and use backpressure instead of unbounded buffering.
  • Update affected components and add small deterministic tests that assert resource ceilings rather than exhausting a host.

Authoritative sources

Complete CVE record and remediation plan

The detailed catalog view below loads this exact record, its source evidence, and the full seven-phase agentic change plan.