CVE-2021-27792

Name: CVE-2021-27792
Creator: NVD / NIST
Published: 2021-08-12T15:15:07.777+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.27%

Last modified Jun 17, 2026

CVE-2021-27792 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. The request handling functions in web management interface of Brocade Fabric OS versions before v9.0.1a, v8.2.3a, and v7.4.2h do not properly handle malformed user input, resulting in a service crash. An authenticated attacker could use this weakness to cause the FOS HTTP application handler to crash, requiring a reboot.. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

Description

The request handling functions in web management interface of Brocade Fabric OS versions before v9.0.1a, v8.2.3a, and v7.4.2h do not properly handle malformed user input, resulting in a service crash. An authenticated attacker could use this weakness to cause the FOS HTTP application handler to crash, requiring a reboot.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.27%

18.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Broadcom	Fabric Operating System	< 7.4.2h
Broadcom	Fabric Operating System	>= 8.0.0, < 8.2.3a
Broadcom	Fabric Operating System	>= 9.0.0, < 9.0.1a

References

https://security.netapp.com/advisory/ntap-20210819-0002/Third Party Advisory
https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1490Vendor Advisory
https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1492Vendor Advisory
https://security.netapp.com/advisory/ntap-20210819-0002/Third Party Advisory
https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1490Vendor Advisory
https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1492Vendor Advisory

Timeline

Published: Aug 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27792?

How severe is CVE-2021-27792?

CVE-2021-27792 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27792?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27792?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST