CVE-2024-20392

What it is

A vulnerability in the web-based management API of Cisco AsyncOS Software for Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to conduct an HTTP response splitting attack. This vulnerability is due to insufficient input validation of some parameters that are passed to the web-based management API of the affected system. An attacker could exploit this vulnerability by persuading a user of an affected interface to click a crafted link. A successful exploit could allow the attacker to perform cross-site scripting (XSS) attacks, resulting in the execution of arbitrary script code in the browser of the targeted user, or could allow the attacker to access sensitive, browser-based information.

At a glance

Exploitability

Can be exploited over the network without logging in, but needs a user to act. Limited direct impact.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

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

Timeline

1. 2024-05-15 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 07:06 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.4% in the next 30 days (EPSS).
• Severity: 6.1 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2024-05-15 18:15 UTC

Last modified

2026-06-17 07:06 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-113

Record status

Analyzed

Affected

• Cisco Asyncos 11.0.3-238
• Cisco Asyncos 11.1.0-069
• Cisco Asyncos 11.1.0-128
• Cisco Asyncos 12.0.0-419
• Cisco Asyncos 12.1.0-071
• Cisco Asyncos 12.1.0-087
• Cisco Asyncos 12.1.0-089
• Cisco Asyncos 12.5.0-066

Attack profile CVSS 3.1 · 6.1

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

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-2024-20392.md and follow it. Check whether this project is affected by CVE-2024-20392. 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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