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CVE-2002-1553

19
FAUCET Score

CVE-2002-1553 describes a critical vulnerability in Cisco ONS15454 and ONS15327 devices running ONS software versions prior to 3.4. This flaw allows remote, unauthenticated attackers to modify system configurations and delete files by establishing an FTP connection with non-existent credentials to the TCC, TCC+, or XTC cards. With a CVSS score of 7.5, this vulnerability presents a high risk due to its network-based attack vector, low attack complexity, and potential for partial compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code in Metasploit or ExploitDB, and it has garnered minimal community discussion or media coverage.

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

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.61%
Probability of exploitation in next 30 days
EPSS Percentile
73.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0161 is in the 56th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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/10505.php
PatchVendor Advisory
securityfocus.com / bid/6076
PatchVendor Advisory