CVE-2021-1437 Cisco Aironet Access Points FlexConnect Upgrade Information Disclosure Vulnerability

What is CVE-2021-1437?

CVE-2021-1437 is a high-severity vulnerability in Cisco Wireless Lan Controller Software, published on 24 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the FlexConnect Upgrade feature of Cisco Aironet Series Access Points Software could allow an unauthenticated, remote attacker to obtain confidential information from an affected device. This vulnerability is due to an unrestricted Trivial File Transfer Protocol (TFTP) configuration. An attacker could exploit this vulnerability by sending a specific TFTP request to an affected device. A successful exploit could allow the attacker to download any file from the filesystem of the affected access point (AP).

Weakness: CWE-275

Which versions are affected by CVE-2021-1437?

It affects 3 products.

Products include Cisco Aironet Access Point Software, Cisco Catalyst 9800 Firmware, Cisco Wireless Lan Controller Software.

How do I fix CVE-2021-1437?

No fix has been published for CVE-2021-1437 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-1437 being exploited?

There is no known exploitation of CVE-2021-1437 in the wild and no public exploit code.

Other vulnerabilities in Cisco Wireless Lan Controller Software

• CVE-2017-3831 Auth bypass in Cisco Mobility Express 1800 Access Point Series Critical 9.8
• CVE-2022-20622 Cisco Embedded Wireless Controller with Catalyst Access Points IP Flood Denial of Service Vulnerability High 8.6
• CVE-2018-0234 Denial of service in Cisco Aironet 1810, 1830, and 1850 Series Access Points High 8.6
• CVE-2016-1419 Denial of service in n/a High 8.1
• CVE-2016-6362 Privilege escalation in n/a High 7.8

All Cisco Wireless Lan Controller Software vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-777j-pmq7-4px5.