CVE-2015-5851

NONECVSS 0.0

0.0

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 v3: —
EG Score: 0.0(none)
EPSS: 19.7%
KEV: Not listed

Published

September 18, 2015

Last Modified

May 6, 2026

References (12)

product-security@applehttp://lists.apple.com/archives/security-announce/2015/Sep/msg00001.html
product-security@applehttp://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
product-security@applehttp://www.securityfocus.com/bid/76764
product-security@applehttp://www.securitytracker.com/id/1033609
product-security@applehttps://support.apple.com/HT205212
product-security@applehttps://support.apple.com/HT205267
af854a3a-2127-422b-91ae-364da2661108http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.html
af854a3a-2127-422b-91ae-364da2661108http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/76764
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1033609
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/HT205212
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/HT205267

Data Freshness Timeline

(refreshed 8× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:14 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:44 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-26 13:41 UTCEPSS rescore
2026-05-26 07:16 UTCEPSS rescore

Frequently asked(4)

What is CVE-2015-5851?

CVE-2015-5851 is a none vulnerability published on September 18, 2015. 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.

When was CVE-2015-5851 disclosed?

CVE-2015-5851 was first published in the National Vulnerability Database on September 18, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2015-5851 actively exploited?

CVE-2015-5851 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2015-5851?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-5851, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2015-5851

📅 Published

🔄 Last Modified

🔗 References (12)