CVE-2022-20742

What it is

A vulnerability in an IPsec VPN library of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to read or modify data within an IPsec IKEv2 VPN tunnel. This vulnerability is due to an improper implementation of Galois/Counter Mode (GCM) ciphers. An attacker in a man-in-the-middle position could exploit this vulnerability by intercepting a sufficient number of encrypted messages across an affected IPsec IKEv2 VPN tunnel and then using cryptanalytic techniques to break the encryption. A successful exploit could allow the attacker to decrypt, read, modify, and re-encrypt data that is transmitted across an affected IPsec IKEv2 VPN tunnel.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering.

Exploit odds

0.5% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2022-05-03 04:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-08-11 19:37 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.5% in the next 30 days (EPSS).
• Severity: 7.4 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2022-05-03 04:15 UTC

Last modified

2026-08-11 19:37 UTC

Exploit probability

0.5% · EPSS, next 30 days

Weakness

CWE-325

Record status

Modified

Affected

• Cisco Secure Firewall Threat Defense < 6.4.0.15
• Cisco Secure Firewall Threat Defense < 6.6.5.2
• Cisco Secure Firewall Threat Defense < 7.0.2
• Cisco Secure Firewall Threat Defense 7.1.0
• Cisco Adaptive Security Appliance Software < 9.12.4.38
• Cisco Adaptive Security Appliance Software < 9.14.4
• Cisco Adaptive Security Appliance Software < 9.15.1.21
• Cisco Adaptive Security Appliance Software < 9.16.2.14

Attack profile CVSS 3.1 · 7.4

Attack vector

Network

Complexity

High

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2022-20742.md and follow it. Check whether this project is affected by CVE-2022-20742. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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