CVE-2016-4473

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-17. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 8%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

/ext/phar/phar_object.c in PHP 7.0.7 and 5.6.x allows remote attackers to execute arbitrary code. NOTE: Introduced as part of an incomplete fix to CVE-2015-6833.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
52(Track)
EG Risk 52/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation8% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
94.0%
KEV
Not listed

Published

June 8, 2017

Last Modified

May 13, 2026

Advisory Details (3)

Auto-updated Jun 24, 2026
Patch available. Sources: redhat.
redhat Patch Available

1347772 – (CVE-2016-4473) CVE-2016-4473 php: Invalid free() instead of efree() in phar_extract_file()

Affected: Red Hat Enterprise Linux 6

https://bugzilla.redhat.com/show_bug.cgi?id=1347772
generic
http://www.securityfocus.com/bid/98999
generic
http://rhn.redhat.com/errata/RHSA-2016-2750.html

Vendor Advisories for CVE-2016-4473(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrh-php56-php-pear-1:1.9.5-4.el72016-11-15redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Data Freshness Timeline

(refreshed 13× in last 7d / 43× 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.

Showing the most recent 100 of 114 total refreshes for this CVE.

  1. 2026-07-23 01:23 UTCEG score recompute
  2. 2026-07-22 22:02 UTCEG score recompute
  3. 2026-07-22 14:04 UTCEPSS rescore
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  70. 2026-05-20 09:27 UTCVendor advisory
  71. 2026-05-20 09:27 UTCGHSA enrichment
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  73. 2026-05-20 05:08 UTCGHSA enrichment
  74. 2026-05-20 00:49 UTCVendor advisory
  75. 2026-05-20 00:49 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2016-4473?
CVE-2016-4473 is a critical vulnerability published on June 8, 2017. /ext/phar/phar_object.c in PHP 7.0.7 and 5.6.x allows remote attackers to execute arbitrary code. NOTE: Introduced as part of an incomplete fix to CVE-2015-6833.
When was CVE-2016-4473 disclosed?
CVE-2016-4473 was first published in the National Vulnerability Database on June 8, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-4473 actively exploited?
CVE-2016-4473 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 94.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-4473?
CVE-2016-4473 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-4473?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-4473, 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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