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    CVE-2007-2688

    The Cisco Intrusion Prevention System (IPS) and IOS with Firewall/IPS Feature Set do not properly handle certain full-width and half-width Unicode character encodings, which might allow remote attackers to evade detection of HTTP traffic.

    Published:May 16, 2007
    Last Modified:Apr 23, 2026
    EPS:May 16, 2007
    EPSS Score:0.04449
    CVSS Score:7.8

    Affected Products

    Vendor
    Cisco
    Product
    Ios
    Vendor
    Cisco
    Product
    Ips Sensor Software

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-20125 (CVSS 7.7) — A vulnerability in the HTTP Server feature of Cisco IOS Software and Cisco IOS XE Software Release 3E could al…
    CVE-2026-20012 (CVSS 8.6) — A vulnerability in the Internet Key Exchange version 2 (IKEv2) feature of Cisco IOS Software, Cisco IOS XE Sof…
    CVE-2025-20363 (CVSS 9) — A vulnerability in the web services of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, Cisco…
    CVE-2025-20149 (CVSS 6.5) — A vulnerability in the CLI of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local…
    CVE-2025-20327 (CVSS 7.7) — A vulnerability in the web UI of Cisco IOS Software could allow an authenticated, remote attacker with low pri…
    CVE-2025-20352 (CVSS 7.7) — A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software and Cisco IOS…
    CVE-2025-20160 (CVSS 8.1) — A vulnerability in the implementation of the TACACS+ protocol in Cisco IOS Software and Cisco IOS XE Software …
    CVE-2025-20253 (CVSS 8.6) — A vulnerability in the IKEv2 feature of Cisco IOS Software, IOS XE Software, Secure Firewall ASA Software, and…
    CVE-2025-20239 (CVSS 8.6) — A vulnerability in the Internet Key Exchange Version 2 (IKEv2) feature of Cisco IOS Software, IOS XE Software,…

    References

    http://secunia.com/advisories/25285
    http://www.cisco.com/en/US/products/products_security_response09186a008083f82e.html
    http://www.gamasec.net/english/gs07-01.html
    http://www.kb.cert.org/vuls/id/739224
    http://www.osvdb.org/35336
    http://www.securityfocus.com/archive/1/468633/100/0/threaded
    http://www.securityfocus.com/bid/23980
    http://www.securitytracker.com/id?1018053
    http://www.securitytracker.com/id?1018054
    http://www.vupen.com/english/advisories/2007/1803
    https://exchange.xforce.ibmcloud.com/vulnerabilities/34277
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5465
    http://secunia.com/advisories/25285
    http://www.cisco.com/en/US/products/products_security_response09186a008083f82e.html
    http://www.gamasec.net/english/gs07-01.html
    http://www.kb.cert.org/vuls/id/739224
    http://www.osvdb.org/35336
    http://www.securityfocus.com/archive/1/468633/100/0/threaded
    http://www.securityfocus.com/bid/23980
    http://www.securitytracker.com/id?1018053
    http://www.securitytracker.com/id?1018054
    http://www.vupen.com/english/advisories/2007/1803
    https://exchange.xforce.ibmcloud.com/vulnerabilities/34277
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5465

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High