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CVE-2022-20760

HIGH · CVSS 8.6EPSS 1.6%EU EUVD

A vulnerability in the DNS inspection handler of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service condition (DoS) on an affected device. This vulnerability is due to a lack of proper processing of incoming requests. An attacker could exploit this vulnerability by sending crafted DNS requests at a high rate to an affected device. A successful exploit could allow the attacker to cause the device to stop responding, resulting in a DoS condition.

Key facts

CVSS score
8.6 (v3.1)
Severity
HIGH
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Weakness (CWE)
CWE-400
EPSS score
1.6% (75th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2022-26010)
Published
May 3, 2022
NVD last modified
August 11, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2022-26010 in the EU Vulnerability Database. Last updated in EUVD on November 6, 2024.

View on the EU Vulnerability Database

Affected products

  • cisco / adaptive security appliance software
  • cisco / secure firewall threat defense
  • cisco / secure firewall threat defense

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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