Secuno
ENNL
Book demo

CVE-2022-20715

Cisco Adaptive Security Appliance Software vulnerability

8.6 HIGHEPSS 1.36%
  1. Published3 May 2022

Description

A vulnerability in the remote access SSL VPN features of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper validation of errors that are logged as a result of client connections that are made using remote access VPN. An attacker could exploit this vulnerability by sending crafted requests to an affected system. A successful exploit could allow the attacker to cause the affected device to restart, resulting in a DoS condition.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Affected products

Cisco Secure Firewall Threat Defense≥ 6.5.0 < 6.6.5.2 · ≥ 6.7.0 < 7.0.2 · < 6.4.0.15 · 7.1.0
Cisco Adaptive Security Appliance Software≥ 9.13 < 9.14.4 · ≥ 9.15 < 9.15.1.21 · ≥ 9.16.0 < 9.16.2.14 · ≥ 9.17.0 < 9.17.1.7

Remediation

Fixed in
Cisco Secure Firewall Threat Defense≥ 6.6.5.2
Cisco Adaptive Security Appliance Software≥ 9.14.4

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-843178.8
Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1,…
CVE-2026-843168.8
Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1,…
CVE-2026-571438.8
PraisonAI is a multi-agent teams system. Prior to praisonaiagents 1.6.62,…
CVE-2026-1034138.8
Improper input validation vulnerability in Apache Camel Karavan. When a deployment…
CVE-2026-764688.2
As part of Cisco's ongoing commitment to proactive security and product quality, the…
CVE-2026-764568.6
As part of Cisco's ongoing commitment to proactive security and product quality, the…

Frequently asked

Is CVE-2022-20715 being actively exploited?

CVE-2022-20715 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.36%.

How severe is CVE-2022-20715?

CVE-2022-20715 has a CVSS 3.1 base score of 8.6, rated high. EPSS estimates a 1.36% probability of exploitation.

Which products are affected by CVE-2022-20715?

Affected products include Cisco Secure Firewall Threat Defense, Cisco Adaptive Security Appliance Software.

How do I fix CVE-2022-20715?

Upgrade affected software to a fixed version, for example Cisco Secure Firewall Threat Defense 6.6.5.2, Cisco Adaptive Security Appliance Software 9.14.4 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2022-20715 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.