Is CVE-2021-1437 in the CISA KEV catalog?

No. CVE-2021-1437 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-1437?

CVE-2021-1437 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-1437?

CVE-2021-1437 has an EPSS score of 1.49% (71th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-1437?

Upgrade catalyst 9800 firmware to 17.3.3 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-1437

HIGHEPSS 71th pctl

7.5

CVSS v3

NVD

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).

CWE-275

How to fix

Remediation Available

catalyst 9800 firmwareNVD

Affected:>= 17.1, < 17.3.3Fixed in:17.3.3CVE-2021-1437derived from NVD

wireless lan controller softwareNVD

Affected:>= 8.10.112.0, < 8.10.142.0Fixed in:8.10.142.0CVE-2021-1437derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

1.49%probability of exploitation in 30 days

71stpercentile

Elevated risk: more likely to be exploited than 71% of all known CVEs.

References

Vendor Advisory1

tools.cisco.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.