CVE-2015-4515: n/a vulnerability

CVE-2015-4515: Mozilla Firefox before 42.0, when NTLM v1 is enabled for HTTP authentication, allows remote attackers to ob...

Mozilla Firefox before 42.0, when NTLM v1 is enabled for HTTP authentication, allows remote attackers to obtain sensitive hostname information by constructing a crafted web site that sends an NTLM request and reads the Workstation field of an NTLM type 3 message.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 06:18 UTC (UTC+00:00)

Security readout for executives and security teams

Firefox versions before 42.0 could reveal a user’s workstation hostname to a malicious website when NTLM v1 HTTP authentication is enabled. This is information disclosure, not code execution, but leaked hostnames can help attackers map internal environments. Exposure is most likely in legacy environments still running Firefox before 42.0 and allowing NTLM v1 for HTTP authentication. Modern patched browsers are not indicated as affected by the bundle. Treat as a legacy hygiene and reconnaissance-risk issue. It should not outrank active exploitation or remote code execution, but any remaining vulnerable browser and NTLM v1 use should be removed promptly. Mitigation focus: Upgrade Firefox to version 42.0 or a vendor-patched package.; Disable NTLM v1 for HTTP authentication where operationally feasible.; Review Mozilla, Ubuntu, Gentoo, SUSE, and Oracle guidance for affected packages..

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

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 5, 2015, 02:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

0ADP providers

3Source 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
GLSA-201512-10CVE reference · vendor-advisory, x_refsource_GENTOO
https://bugzilla.mozilla.org/show_bug.cgi?id=1046421CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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