Out-of-bounds read in Brocade Fabric OS
Priority LOW 25CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.00604 49th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Brocade Fabric OS | Brocade Fabric OS before Brocade Fabric OS v9.0.1a and v8.2.3a | — | No fix listed | CNA |
- Brocade Fabric OS Vendor— Affected Brocade Fabric OS before Brocade Fabric OS v9.0.1a and v8.2.3a Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:broadcom:fabric_operating_system:*:*:*:*:*:*:*:* | 8.2.1 to before 8.2.3a; 9.0.0 to before 9.0.1a | Vulnerable | Broadcom |
- cpe:2.3:o:broadcom:fabric_operating_system:*:*:*:*:*:*:*:* Versions 8.2.1 to before 8.2.3a; 9.0.0 to before 9.0.1a Vulnerable ·Broadcom
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-27791
- 2026-10-03 Alias added: GHSA-vg73-mjx3-8p9g
References
More Broadcom Fabric Operating System vulnerabilities
- TI-2025-01721 Code injection exposure in Fabric OS 9.1.0 through 9.1.1d6 KEVCVSS 4.0HIGH 8.6
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
- TI-2022-10659 Information disclosure in https://github.com/curl/curl CVSS 3.1HIGH 7.5
- TI-2020-01888 Segmentation fault in SSL_check_chain CVSS 3.1HIGH 7.5
- TI-2022-06845 Improper authentication in https://github.com/curl/curl CVSS 3.1HIGH 8.1
- TI-2020-12413 scp in OpenSSH through 8.3p1 allows command injection in the scp.c toremote function, as… CVSS 3.1HIGH 7.8
Sources
- CVE-2021-27791 · CVE Program
- CVE-2021-27791 · NVD
- FIRST EPSS
- GHSA-vg73-mjx3-8p9g · GitHub Advisory Database · CC BY 4.0
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