Low 2.1Published Sep 18, 2015

CVE-2015-5851The 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 enc…

Updated under an hour ago (Nov 2, 2026, 1:40 AM ET)

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It affects apple mac_os_x and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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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.

CVSS: 2.1 LOW (v2.0, NVD)AV:L/AC:L/Au:N/C:P/I:N/A:N
Weakness (CWE): CWE-200
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

apple mac_os_x apple:mac_os_x	through 10.10.5	NVD
apple iphone_os apple:iphone_os	through 8.4.1	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.