Is CVE-2021-27793 in the CISA KEV catalog?

No. CVE-2021-27793 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-27793?

CVE-2021-27793 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2021-27793?

CVE-2021-27793 has an EPSS score of 0.91% (55th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-27793?

Upgrade fabric operating system to 9.0.1 or later.

CVE & CISA-KEV Catalog

CVE-2021-27793

MEDIUM

5.3

CVSS v3

NVD

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.

CWE-863Incorrect Authorization

How to fix

Remediation Available

fabric operating systemNVD

Affected:>= 9.0.0, < 9.0.1Fixed in:9.0.1CVE-2021-27793derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

0.91%probability of exploitation in 30 days

55thpercentile

Moderate risk: more likely to be exploited than 55% of all known CVEs.

References

Vendor Advisory1

broadcom.com

Third-Party Advisory1

security.netapp.com

Related Vulnerabilities

Other CWE-863 (Incorrect Authorization) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-22518	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-38035	Critical	9.8	100%	KEV + Ransom	-
CVE-2022-46169	Critical	9.8	100%	KEV	Fix
CVE-2025-29927	Critical	9.1	100%	-	Fix
CVE-2024-38856	Critical	9.8	99%	KEV	Fix
CVE-2020-36289	Medium	5.3	99%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.