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CVE-2002-1556

19
FAUCET Score

CVE-2002-1556 describes a denial-of-service vulnerability affecting Cisco ONS15454 and ONS15327 devices running ONS software versions prior to 3.4. An unauthenticated attacker can trigger a device reset by sending a crafted HTTP request containing an invalid CORBA Interoperable Object Reference (IOR) to the TCC, TCC+, or XTC interfaces. This vulnerability has a CVSS score of 5.0, indicating a medium severity, with low attack complexity and no authentication required, leading to a partial availability impact. There is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Despite its age, the CVE has garnered significant community discussion, with 10 mentions.

Impacted Technologies

VendorProductVersion(s)CPE
3.0CPE matchmatch criteria
cpe:2.3:a:cisco:optical_networking_systems_software:3.0:*:*:*:*:*:*:*
3.1.0CPE matchmatch criteria
cpe:2.3:a:cisco:optical_networking_systems_software:3.1.0:*:*:*:*:*:*:*
3.2CPE matchmatch criteria
cpe:2.3:a:cisco:optical_networking_systems_software:3.2:*:*:*:*:*:*:*
3.2.0CPE matchmatch criteria
cpe:2.3:a:cisco:optical_networking_systems_software:3.2.0:*:*:*:*:*:*:*
3.3.0CPE matchmatch criteria
cpe:2.3:a:cisco:optical_networking_systems_software:3.3.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.39%
Probability of exploitation in next 30 days
EPSS Percentile
69.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0139 is in the 51st percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisco.com / warp/public/707/ons-multiple-vuln-pub.shtml
PatchVendor Advisory
iss.net / security_center/static/10508.php
PatchVendor Advisory
securityfocus.com / bid/6084
PatchVendor Advisory