Security readout for executives and security teams
FreeRADIUS systems before 2.2.0 could let a person keep authenticating with a Unix account after that password had expired. This does not create a new account or bypass knowing a password, but it can weaken offboarding and access-control policies for services backed by RADIUS, such as VPN or network access. Exposure is likely limited to organizations running FreeRADIUS before 2.2.0 with Unix authentication enabled against local shadow password aging. Systems using other authentication backends, or vendor packages containing the referenced fix, may not be affected. Prioritize remediation where FreeRADIUS gates VPN, Wi-Fi, administrative, or production access. The risk is policy bypass rather than full remote compromise, but it can undermine account-expiration controls and offboarding expectations. Mitigation focus: Upgrade FreeRADIUS to 2.2.0 or a vendor package containing the fix.; Review Red Hat or SUSE advisories for distribution-specific corrected packages.; Disable Unix authentication mode if it is not required..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2011-4966 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/alandekok/freeradius-server/commit/1b1ec5ce75e224bd1755650c18ccdaa6dc53e605CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.