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CVE-2002-1558

31
FAUCET Score

CVE-2002-1558 describes an unchangeable and undisableable default account within the VxWorks Operating System on Cisco ONS15454 and ONS15327 devices running ONS software prior to version 3.4. This critical vulnerability allows remote attackers to gain full administrative privileges by connecting via Telnet. With a CVSS score of 10.0, it represents a severe threat due to its network-based attack vector, low complexity, and complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

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

10.0HIGH

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

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

Exploit Intelligence

EPSS Score
2.79%
Probability of exploitation in next 30 days
EPSS Percentile
84.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0279 is in the 73rd percentile among its peer group of 51,506 CVEs.

Social Chatter

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/10510.php
PatchVendor Advisory
securityfocus.com / bid/6083
PatchVendor Advisory