CVE-2016-6870

9.8 CRITICAL

Published: February 17, 2017 Modified: May 13, 2026

Description

Out-of-bounds write in the (1) mb_detect_encoding, (2) mb_send_mail, and (3) mb_detect_order functions in Facebook HHVM before 3.15.0 allows attackers to have unspecified impact via unknown vectors.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

http://www.openwall.com/lists/oss-security/2016/08/11/1

Source: cve@mitre.org

Mailing List Patch Third Party Advisory

http://www.openwall.com/lists/oss-security/2016/08/19/1

Source: cve@mitre.org

Mailing List Patch Third Party Advisory

https://github.com/facebook/hhvm/commit/365abe807cab2d60dc9ec307292a06181f77a9c2

Source: cve@mitre.org

Patch Vendor Advisory

http://www.openwall.com/lists/oss-security/2016/08/11/1

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing List Patch Third Party Advisory

http://www.openwall.com/lists/oss-security/2016/08/19/1

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing List Patch Third Party Advisory

https://github.com/facebook/hhvm/commit/365abe807cab2d60dc9ec307292a06181f77a9c2

Source: af854a3a-2127-422b-91ae-364da2661108

Patch Vendor Advisory

6 reference(s) from NVD

Quick Stats

CVSS v3 Score

9.8 / 10.0

EPSS (Exploit Probability)

2.2%

80th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-787

Affected Vendors

facebook

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