CVE-2011-4231: n/a vulnerability

CVE-2011-4231: Cisco IOS 15.1 and 15.2 and IOS XE 3.x, when configured as an IPsec hub with X.509 certificates in use, all...

Cisco IOS 15.1 and 15.2 and IOS XE 3.x, when configured as an IPsec hub with X.509 certificates in use, allows remote authenticated users to cause a denial of service (segmentation fault and device crash) via unspecified vectors, aka Bug ID CSCtq61128.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 16, 2024, 20:07 UTC (UTC+00:00)

Security readout for executives and security teams

This CVE affects Cisco IOS and IOS XE devices acting as IPsec hubs using X.509 certificates. An authenticated remote user could trigger a crash, causing denial of service. The provided sources do not include a CVSS score, confirmed exploitation, or detailed fix instructions. Exposure appears limited to Cisco IOS 15.1/15.2 or IOS XE 3.x systems configured as IPsec hubs using X.509 certificates. Organizations without that role, software family, or certificate-based IPsec configuration are less likely affected. Treat as a targeted availability risk for legacy Cisco VPN hub infrastructure. Urgency depends on whether affected versions and certificate-based IPsec hub configurations remain in service. Mitigation focus: Identify Cisco IOS/IPsec hubs using X.509 certificates.; Check Cisco release notes and vendor guidance for fixed software.; Prioritize unsupported or internet-reachable VPN hubs for review..

Prepared: Jun 24, 2026, 12:52 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 3, 2012, 10:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

1Source links

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

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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