CVE-2015-5887

critical
Published 2015-10-09 · Modified 2026-05-06
CVSS v3
CVSS v2
10.0
VIR risk
10.0

Description

The TLS Handshake Protocol implementation in Secure Transport in Apple OS X before 10.11 accepts a Certificate Request message within a session in which no Server Key Exchange message has been sent, which allows remote attackers to have an unspecified impact via crafted TLS data.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: product-security@apple.com — https://support.apple.com/HT205267

vendor Authored 2026-05-27

Vendor advisory: product-security@apple.com — http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html

OS impact

OSVersionStatusFixed in
macos macosaffected

References

CWEs

CWE-17

Verify integrity in audit chain (admin only). AS-IS.