Is CVE-2020-3559 in the CISA KEV catalog?

No. CVE-2020-3559 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-3559?

CVE-2020-3559 has a CVSS v3 base score of 8.6 (HIGH).

What is the EPSS score for CVE-2020-3559?

CVE-2020-3559 has an EPSS score of 1.40% (69th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-3559?

Upgrade access points to 16.12.4a or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2020-3559

HIGH

8.6

CVSS v3

NVD

Description

A vulnerability in Cisco Aironet Access Point (AP) Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to improper handling of clients that are trying to connect to the AP. An attacker could exploit this vulnerability by sending authentication requests from multiple clients to an affected device. A successful exploit could allow the attacker to cause the affected device to reload.

CWE-400Resource Exhaustion

How to fix

Remediation Available

access pointsNVD

Affected:< 16.12.4aFixed in:16.12.4aCVE-2020-3559derived from NVD

business access pointsNVD

Affected:>= 10.0, < 10.1.1.0Fixed in:10.1.1.0CVE-2020-3559derived from NVD

wireless lan controllerNVD

Affected:>= 8.9, < 8.10.112.0Fixed in:8.10.112.0CVE-2020-3559derived 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

ScopeChanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.40%probability of exploitation in 30 days

69thpercentile

Moderate risk: more likely to be exploited than 69% of all known CVEs.

References

Vendor Advisory1

tools.cisco.com

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-44487	High	7.5	100%	KEV	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2024-25617	Medium	5.3	89%	-	Fix
CVE-2018-1000115	High	7.5	89%	-	Fix

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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.