CVE-2021-27793: broadcom fabric_operating_system Incorrect Authorization
CVSS: 5.3v3.1MediumModified
Published 12-08-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-27793 is a medium (CVSS 5.3) Incorrect Authorization vulnerability in broadcom fabric_operating_system. EPSS estimates a 0.91% chance of exploitation in the next 30 days, higher than 59.1% of scored vulnerabilities.
CVSS score
5.3/10
010
Medium · v3.1 (NVD)EPSS score
0.91%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 12-08-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 1 source · 2 versionsMedium 5.3Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LSourcesSingle source
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
0.91%
Chance of exploitation in the next 30 days
Percentile
59%
Versus all other CVEs
30-day change
0.00 pp
From 0.91% on 19-09-2026
19-09-202619-10-2026
EPSS score0.91%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Broadcom1 product
- fabric_operating_system≥ 8.2.0, < 8.2.3 | ≥ 9.0.0, < 9.0.1 | 8.2.3 | 9.0.1 | 9.0.1a
1 vendor · 1 product