CVE-2010-1576

CVE-2010-1576 is a high-severity vulnerability in Cisco Content Services Switch 11500 with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

• Severity: High (CVSS 2.0 base score 7.5)
• EPSS exploit prediction: 2% (76th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-20
• Affected product: Cisco Content Services Switch 11500
• Published: 2010-07-06
• Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2010-1576?

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.

How severe is CVE-2010-1576?

CVE-2010-1576 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2010-1576 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-1576?

CVE-2010-1576 primarily affects Cisco Content Services Switch 11500. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-1576?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2010-1576 published?

CVE-2010-1576 was published on 2010-07-06 and last updated on 2026-06-16.

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/

Affected products (8)

• cpe:2.3:h:cisco:content_services_switch_11500:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco:content_services_switch_11500:8.20.0.01:*:*:*:*:*:*:*
• cpe:2.3:h:cisco:content_services_switch_11500:08.20.1.01:*:*:*:*:*:*:*
• cpe:2.3:h:cisco:content_services_switch_11500:8.20.1.01:*:*:*:*:*:*:*
• cpe:2.3:h:cisco:content_services_switch_11500:8.20.2.01:*:*:*:*:*:*:*
• cpe:2.3:h:cisco:ace_4710:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco:ace_4710:a1\(2.0\):*:*:*:*:*:*:*
• cpe:2.3:h:cisco:ace_4710:a1\(8.0\):*:*:*:*:*:*:*

More vulnerabilities in Cisco Content Services Switch 11500

• CVE-2010-2629 — High (CVSS 7.5): The Cisco Content Services Switch (CSS) 11500 with software 8.20.4.02 and the Application Control Engine (ACE) 4710…
• CVE-2010-1575 — High (CVSS 7.5): The Cisco Content Services Switch (CSS) 11500 with software 08.20.1.01 conveys authentication data through ClientCert-*…
• CVE-2004-0079 — High (CVSS 7.5): The do_change_cipher_spec function in OpenSSL 0.9.6c to 0.9.6k, and 0.9.7a to 0.9.7c, allows remote attackers to cause…
• CVE-2006-1631 — Medium (CVSS 5.0): Unspecified vulnerability in the HTTP compression functionality in Cisco CSS 11500 Series Content Services switches…
• CVE-2005-3426 — Medium (CVSS 5.0): Cisco CSS 11500 Content Services Switch (CSS) with SSL termination services allows remote attackers to cause a denial…
• CVE-2005-0356 — Medium (CVSS 5.0): Multiple TCP implementations with Protection Against Wrapped Sequence Numbers (PAWS) with the timestamps option enabled…

All CVEs affecting Cisco Content Services Switch 11500 →

Other CWE-20 (Improper Input Validation) vulnerabilities

• CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
• CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
• CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
• CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
• CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
• CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →