CVE-2021-1397

What it is

A vulnerability in the web-based management interface of Cisco Integrated Management Controller (IMC) Software could allow an unauthenticated, remote attacker to redirect a user to a malicious web page. This vulnerability is due to improper input validation of the parameters in an HTTP request. An attacker could exploit this vulnerability by persuading a user to click a crafted link. A successful exploit could allow the attacker to redirect a user to a malicious website. This vulnerability is known as an open redirect attack, which is used in phishing attacks to get users to visit malicious sites without their knowledge.

At a glance

Exploitability

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

Exploit odds

0.8% chance of exploitation in the next 30 days (EPSS).

Fix

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

Timeline

1. 2021-05-06 13:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 03:31 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.8% in the next 30 days (EPSS).
• Severity: 4.7 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2021-05-06 13:15 UTC

Last modified

2026-06-17 03:31 UTC

Exploit probability

0.8% · EPSS, next 30 days

Weakness

CWE-601

Record status

Modified

Affected

• Cisco Integrated Management Controller < 3.2\(12.4\)
• Cisco Ucs Manager ≤ 4.1\(3b\)
• Cisco Encs 5100 Firmware ≤ 4.4.2
• Cisco Encs 5400 Firmware ≤ 4.4.2
• Cisco c220 m6 Firmware ≤ 4.1\(2f\)
• Cisco c225 m6 Firmware ≤ 4.1\(2f\)
• Cisco c240 m6 Firmware ≤ 4.1\(2f\)
• Cisco c245 m6 Firmware ≤ 4.1\(2f\)

Attack profile CVSS 3.1 · 4.7

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

Required

Scope

Changed

Confidentiality

None

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-2021-1397.md and follow it. Check whether this project is affected by CVE-2021-1397. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

Copy as ticket · More options · Status badge