CVE-2021-27791: broadcom fabric_operating_system Out-of-bounds Read
Vulnerability summary
CVE-2021-27791 is a medium (CVSS 5.5) Out-of-bounds Read vulnerability in broadcom fabric_operating_system. EPSS estimates a 0.60% chance of exploitation in the next 30 days, higher than 47.9% of scored vulnerabilities.
Timeline
- 12-08-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
The function that is used to parse the Authentication header in Brocade Fabric OS Web application service before Brocade Fabric OS v9.0.1a and v8.2.3a fails to properly process a malformed authentication header from the client, resulting in reading memory addresses outside the intended range. An unauthenticated attacker could discover a request, which could bypass the authentication process.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
0.60%
Chance of exploitation in the next 30 days
Percentile
48%
Versus all other CVEs
30-day change
0.00 pp
From 0.60% on 19-09-2026
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≥ 8.2.1, < 8.2.3a | ≥ 9.0.0, < 9.0.1a
1 vendor · 1 product