What’s Vulnerable › Vulnerabilities

CVE-2015-5851

• Severity: low (CVSS 2.1 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2015-09-18 · updated 2026-06-17
• Weakness: CWE-200

Description

The convenience initializer in the Multipeer Connectivity component in Apple iOS before 9 does not require an encrypted session, which allows local users to obtain cleartext multipeer data via an encrypted-to-unencrypted downgrade attack.

Affected products

• Apple Iphone Os: through 8.4.1
• macOS: through 10.10.5

References

• http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.html
• http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
• http://www.securityfocus.com/bid/76764
• http://www.securitytracker.com/id/1033609
• https://support.apple.com/HT205212
• https://support.apple.com/HT205267
• http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.html
• http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
• http://www.securityfocus.com/bid/76764
• http://www.securitytracker.com/id/1033609
• https://support.apple.com/HT205212
• https://support.apple.com/HT205267

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