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CVE-2004-1105

19
FAUCET Score

CVE-2004-1105 describes an information disclosure vulnerability in Nortel Networks Contivity VPN Client. This flaw allows remote attackers to enumerate valid usernames by observing distinct error messages for valid versus invalid login attempts. With a CVSS score of 5.0, this vulnerability is of medium severity, requiring no authentication and having a low attack complexity, potentially leading to unauthorized information access. While there is no known active exploitation, public exploit code, or KEV listing, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
4.91CPE matchmatch criteria
cpe:2.3:h:nortel:contivity:4.91:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.04%
Probability of exploitation in next 30 days
EPSS Percentile
79.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0204 is in the 68th percentile among its peer group of 23,690 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

archives.neohapsis.com / archives/fulldisclosure/2004-11/0291.html
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/17988
kb.cert.org / vuls/id/830214
Third Party AdvisoryUS Government Resource
kb.cert.org / vuls/id/CRDY-626N7F
US Government Resource
nii.co.in / vuln/contivity.html
securityfocus.com / bid/11623
PatchVendor Advisory