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CVE-2005-2105

26
FAUCET Score

CVE-2005-2105 describes a critical vulnerability in Cisco IOS versions 12.2T through 12.4, allowing remote attackers to bypass RADIUS AAA authentication. This bypass occurs when the fallback authentication method is set to "none" and a specially crafted long username is provided. The vulnerability has a CVSS score of 7.5, indicating high severity with network access, low attack complexity, and potential for partial compromise of confidentiality, integrity, and availability. There is no known active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
12.2\(2\)xrCPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.2\(2\)xr:*:*:*:*:*:*:*
12.2\(4\)xrCPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.2\(4\)xr:*:*:*:*:*:*:*
12.2tCPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.2t:*:*:*:*:*:*:*
12.2xbCPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.2xb:*:*:*:*:*:*:*
12.2xcCPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.2xc:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.59%
Probability of exploitation in next 30 days
EPSS Percentile
83.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0259 is in the 71st percentile among its peer group of 51,551 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

exchange.xforce.ibmcloud.com / vulnerabilities/21190
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5756
cisco.com / warp/public/707/cisco-sa-20050629-aaa.shtml
PatchVendor Advisory
securitytracker.com / alerts/2005/Jun/1014330.html
Patch