vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2021-27793

MEDIUM
5.3
CVSS Score
Published: August 12, 2021 at 02:24 PM UTC
Updated: June 17, 2026 at 03:45 AM UTC
1 product affected across 1 vendorFabric Operating System

Using Brocade Fabric OS by N/A?

Get instant alerts when new vulnerabilities affect Brocade Fabric OS - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM5.3
Exploit prediction
EPSS 0.9%

Description

ntermittent authorization failure in aaa tacacs+ with Brocade Fabric OS versions before Brocade Fabric OS v9.0.1b and after 9.0.0, also in Brocade Fabric OS before Brocade Fabric OS v8.2.3a and after v8.2.0 could cause a user with a valid account to be unable to log into the switch.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fabric Operating System· Broadcom
95%
8.2.0 ≤ v < 8.2.39.0.0 ≤ v < 9.0.18.2.39.0.19.0.1aVersions before Brocade Fabric OS v9.0.1b and after 9.0.0, also before Brocade Fabric OS v8.2.3a and after v8.2.0
Affected range stops below 8.2.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.0.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20210819-0001/
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1553

CVSS

5.3MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-863

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card