A vulnerability in input validation exists in curl <8.0 during communication using the TELNET protocol may allow an attacker to pass on maliciously crafted user name and "telnet options" during server negotiation
36835
27 January 2026
27 January 2026
CLOSED
LOW
8.8 High - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVE-2023-27533
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Brocade Security Advisory ID |
BSA-2026-2261 |
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Component |
curl |
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Summary
A vulnerability in input validation exists in curl <8.0 during communication using the TELNET protocol may allow an attacker to pass on maliciously crafted user name and "telnet options" during server negotiation. The lack of proper input scrubbing allows an attacker to send content or perform option negotiation without the application's intent. This vulnerability could be exploited if an application allows user input, thereby enabling attackers to execute arbitrary code on the system.
Products Affected
- No Brocade Fibre channel products from Broadcom are affected
Products Not Affected
- Brocade Fabric OS versions before 10.0.0
[VEX Justification: Vulnerable_code_not_in_execute_path] - Brocade ASCG
[VEX Justification: Vulnerable_code_not_in_execute_path] - Brocade SANnav
[VEX Justification: Vulnerable_code_not_in_execute_path]
Solution
- While Brocade Fabric OS is not affected, a security update has been provided in Brocade Fabric OS 10.0.0
Revision History
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Version |
Change |
Date |
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1.0 |
Initial Publication |
January 27, 2026 |
Disclaimer
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