CVE-2015-6112: n/a vulnerability

CVE-2015-6112: SChannel in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Wind...

SChannel in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 lacks the required extended master-secret binding support to ensure that a server's X.509 certificate is the same during renegotiation as it was before renegotiation, which allows man-in-the-middle attackers to obtain sensitive information or modify TLS session data via a "triple handshake attack," aka "Schannel TLS Triple Handshake Vulnerability."

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 07:15 UTC (UTC+00:00)

Security readout for executives and security teams

This is a Windows SChannel TLS flaw affecting older Microsoft Windows versions. A network attacker positioned between client and server could abuse TLS renegotiation weaknesses to read sensitive information or alter TLS session data. The source bundle does not provide CVSS scoring. Exposure is most likely on legacy Windows systems listed in the CVE that use SChannel for TLS, including Windows Vista, 7, 8, 8.1, Windows Server 2008, and Server 2012 variants. Treat this as a legacy Windows TLS risk. It is not KEV-listed in the provided bundle, but affected systems handling sensitive network traffic should be patched, upgraded, or isolated. Mitigation focus: Review Microsoft MS15-121 vendor guidance for the applicable security update.; Patch affected Windows systems where supported by Microsoft guidance.; Prioritize systems handling sensitive TLS traffic or exposed to untrusted networks..

Prepared: Jun 13, 2026, 21:45 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

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup

cve · low confidence lookup

CVE-2015-6112 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 11, 2015, 11:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
MS15-121CVE reference · vendor-advisory, x_refsource_MS

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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