CVE-2007-2688

Severity: high (CVSS 7.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2007-05-16 · updated 2026-06-16

Description

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.

Affected products

Cisco IOS: 10.0, 11.1cc, 11.3, 12.0, 12.0s, 12.0st (+6)
Cisco Ips Sensor Software: 4.0, 5.0(1), 5.0(2), 5.0(6)p1, 5.1(1), 5.1(1a) (+5)

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

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