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CVE-2000-0380

54
FAUCET Score

CVE-2000-0380 describes a denial-of-service vulnerability affecting Cisco routers and switches running IOS versions 11.1 through 12.1. Remote attackers can exploit this by sending an HTTP GET request containing a "%%" string to the device's HTTP service, leading to a system crash. With a CVSS score of 7.1 (High), this vulnerability is easily exploitable over the network with medium attack complexity, resulting in a complete loss of availability. While not on the KEV catalog, exploit modules are publicly available in Metasploit and ExploitDB, indicating readily accessible exploit code, though there is no recorded community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
11.1CPE matchmatch criteria
cpe:2.3:o:cisco:ios:11.1:*:*:*:*:*:*:*
11.2CPE matchmatch criteria
cpe:2.3:o:cisco:ios:11.2:*:*:*:*:*:*:*
11.2\(4\)f1CPE matchmatch criteria
cpe:2.3:o:cisco:ios:11.2\(4\)f1:*:*:*:*:*:*:*
11.2\(8\)CPE matchmatch criteria
cpe:2.3:o:cisco:ios:11.2\(8\):*:*:*:*:*:*:*
11.2\(8\)pCPE matchmatch criteria
cpe:2.3:o:cisco:ios:11.2\(8\)p:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.1HIGH

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
35.00%
Probability of exploitation in next 30 days
EPSS Percentile
98.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: Cisco IOS HTTP GET /%% Request Denial of Service · Apr 26, 2000
ExploitDB: EDB-19882 · Apr 26, 2000
This CVE's current EPSS score of 0.3500 is in the 95th percentile among its peer group of 8,915 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 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

archives.neohapsis.com / archives/bugtraq/2000-04/0261.html
cisco.com / warp/public/707/ioshttpserver-pub.shtml
osvdb.org / 1302
securityfocus.com / bid/1154