CVE-2011-3253: n/a vulnerability

CVE-2011-3253: CalDAV in Apple iOS before 5 does not validate X.509 certificates for SSL sessions, which allows man-in-the...

CalDAV in Apple iOS before 5 does not validate X.509 certificates for SSL sessions, which allows man-in-the-middle attackers to spoof calendar servers and obtain sensitive information via an arbitrary certificate.

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

Security readout for executives and security teams

Older Apple iOS devices before iOS 5 could trust a fake encrypted calendar server because CalDAV did not properly validate certificates. A network attacker could impersonate the calendar server and obtain sensitive information. Exposure is limited to legacy Apple iOS devices before version 5 using CalDAV calendar synchronization. Modern managed fleets are unlikely to be affected unless very old, unmanaged, lab, or retained devices remain in service. Treat this as a legacy exposure cleanup item, not a current broad emergency. Prioritize if the organization still operates pre-iOS 5 devices or allows unmanaged legacy devices to access calendar services. Mitigation focus: Identify any iOS devices running versions before iOS 5.; Upgrade affected devices to iOS 5 or later where possible.; Retire devices that cannot be upgraded safely..

Prepared: Jun 27, 2026, 17:48 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: Oct 14, 2011, 10:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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1Source links

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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Weakness

CWE details

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