The function that is used to parse the Authentication header in Brocade Fabric OS Web application service before Brocade Fabric OS v9.0.1a…

published 2021-08-12 5y ago modified 2026-06-17 4mo ago also EUVD-2021-14532

cvss: 5.4; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

broadcom fabric_operating_system 8.2.3a, 9.0.1a

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Exploit prediction

0.60% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
NVD	2.0	5.5	AV:N/AC:L/Au:S/C:P/I:P/A:N

Affected products

n/a Brocade Fabric OS

Classification

Weakness

CWE-125 Out-of-bounds Read

References

broadcom.com /support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1491
vendor-advisory
security.netapp.com /advisory/ntap-20210819-0002/
third-party-advisory

Sources

CVE List CVE-2021-27791
NVD CVE-2021-27791

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