CVE-2002-1557: Cisco Optical Networking Systems Software

Medium severity, CVSS 5.0. EPSS: 1.4% chance of exploitation in the next 30 days.

Cisco ONS15454 and ONS15327 running ONS before 3.4 allows attackers to cause a denial of service (reset to TCC, TCC+, TCCi or XTC) via a malformed HTTP request that does not contain a leading / (slash) character.

Affected products

• Cisco Optical Networking Systems Software: version 3.0 only; version 3.1.0 only; version 3.2 only; version 3.2.0 only; version 3.3.0 only

Published 2003-03-31. Last modified 2026-06-16.