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CVE-2001-0861

15
FAUCET Score

CVE-2001-0861 describes a denial-of-service vulnerability affecting Cisco 12000 series routers running IOS 12.0 with Engine 2 or earlier line cards. An unauthenticated remote attacker can exploit this by flooding the router with traffic, causing it to generate excessive ICMP Unreachable replies, leading to high CPU utilization. This vulnerability is rated Medium severity with a CVSS score of 5.0, indicating a network-based attack with low complexity and potential for partial availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this older CVE.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:h:cisco:12000_router:*:*:*:*:*:*:*:*

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
1.68%
Probability of exploitation in next 30 days
EPSS Percentile
74.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0168 is in the 59th percentile among its peer group of 23,723 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, 0.0 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/7536
ciac.org / ciac/bulletins/m-018.shtml
cisco.com / warp/public/707/GSR-unreachables-pub.shtml
PatchVendor Advisory
osvdb.org / 794
securityfocus.com / bid/3534