What’s Vulnerable › Vulnerabilities

CVE-2010-1576

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2010-07-06 · updated 2026-06-16
• Weakness: CWE-20

Description

The Cisco Content Services Switch (CSS) 11500 with software before 8.20.4.02 and the Application Control Engine (ACE) 4710 with software before A2(3.0) do not properly handle use of LF, CR, and LFCR as alternatives to the standard CRLF sequence between HTTP headers, which allows remote attackers to bypass intended header insertions or conduct HTTP request smuggling attacks via crafted header data, as demonstrated by LF characters preceding ClientCert-Subject and ClientCert-Subject-CN headers, aka Bug ID CSCta04885.

Affected products

• Cisco Ace 4710: through a3\(2.5\); a1(2.0), a1(8.0)
• Cisco Content Services Switch 11500: through 8.20.3.03; 8.20.0.01, 08.20.1.01, 8.20.1.01, 8.20.2.01

References

• http://osvdb.org/66092
• http://securitytracker.com/id?1024167
• http://securitytracker.com/id?1024168
• http://www.securityfocus.com/archive/1/512144/100/0/threaded
• http://www.securityfocus.com/bid/41315
• http://www.vsecurity.com/resources/advisory/20100702-1/
• http://osvdb.org/66092
• http://securitytracker.com/id?1024167
• http://securitytracker.com/id?1024168
• http://www.securityfocus.com/archive/1/512144/100/0/threaded
• http://www.securityfocus.com/bid/41315
• http://www.vsecurity.com/resources/advisory/20100702-1/

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