CVE-2005-2105

CVE-2005-2105 is a high-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Cisco IOS 12.2T through 12.4 allows remote attackers to bypass Authentication, Authorization, and Accounting (AAA) RADIUS authentication, if the fallback method is set to none, via a long username.

Frequently asked questions

What is CVE-2005-2105?
Cisco IOS 12.2T through 12.4 allows remote attackers to bypass Authentication, Authorization, and Accounting (AAA) RADIUS authentication, if the fallback method is set to none, via a long username.
How severe is CVE-2005-2105?
CVE-2005-2105 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2005-2105 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-2105?
CVE-2005-2105 primarily affects Cisco Ios. In total, 92 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-2105?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2005-2105 published?
CVE-2005-2105 was published on 2005-07-05 and last updated on 2026-06-16.

References

Affected products (92)

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