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CVE-2001-0055

19
FAUCET Score

CVE-2001-0055 describes a denial-of-service vulnerability in Cisco 600 series routers running CBOS 2.4.1 and earlier. An unauthenticated remote attacker can exploit this by sending a slow stream of TCP SYN packets, causing the device to become unresponsive. This vulnerability has a CVSS score of 5.0 (Medium), indicating a network-based attack with low complexity and potential for partial availability impact. While there is no evidence of active exploitation, readily available exploit code, or media coverage, the vulnerability has garnered some community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.3.8CPE matchmatch criteria
cpe:2.3:o:cisco:broadband_operating_system:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:h:cisco:cisco_6xx_routers:*:*:*:*:*:*:*:*

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
1.29%
Probability of exploitation in next 30 days
EPSS Percentile
67.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0129 is in the 47th 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

exchange.xforce.ibmcloud.com / vulnerabilities/5627
cisco.com / warp/public/707/CBOS-multiple.shtml
Vendor Advisory