CVE-2016-7124

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 17%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

ext/standard/var_unserializer.c in PHP before 5.6.25 and 7.x before 7.0.10 mishandles certain invalid objects, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via crafted serialized data that leads to a (1) __destruct call or (2) magic method call.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
65
EG Risk 65/100CISA SSVC

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%
Exploitation40% × 40%
Automatability30% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
17%
EPSS %ILE
96th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 12, 2016

Last Modified

June 17, 2026

Advisory Details (10)

Auto-updated Sep 29, 2026
Patch available. Sources: github_commit.
generic

[R6] SecurityCenter 5.4.1 Fixes Multiple Vulnerabilities - Security Advisory | Tenable®

https://www.tenable.com/security/tns-2016-19
generic

PHP: Multiple vulnerabilities (GLSA 201611-22) — Gentoo security

https://security.gentoo.org/glsa/201611-22
github_commit

commit 20ce2fe8e3c2 (php/php-src)

Fix landed in php/php-src commit 20ce2fe8e3c2 — awaiting tagged release

https://github.com/php/php-src/commit/20ce2fe8e3c211a42fee05a461a5881be9a8790e?w=1
generic

PHP :: Sec Bug #72663 :: Create an Unexpected Object and Don't Invoke __wakeup() in Deserialization

https://bugs.php.net/bug.php?id=72663
generic

CVE-2016-7124 - PSIRT.COM

http://www.securityfocus.com/bid/92756
generic

PHP: PHP 7 ChangeLog

http://www.php.net/ChangeLog-7.php
generic

PHP: PHP 5 ChangeLog

http://www.php.net/ChangeLog-5.php
generic
http://rhn.redhat.com/errata/RHSA-2016-2750.html
generic

oss-security - Re: CVE assignment for PHP 5.6.25 and 7.0.10 - and libcurl

http://openwall.com/lists/oss-security/2016/09/02/9
generic
http://www.securitytracker.com/id/1036680

Vendor Advisories for CVE-2016-7124(1)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuphp7.0-zip (7.0.8-0ubuntu0.16.04.3) @ xenial2026-05-20ubuntu
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.

Affected Packages

(2 across 2 ecosystems)
Debian:7(1)
PackageVulnerable rangeFix by version rangeDependents
php55.4.11-1 ... 5.4.9-4 (40 versions)
  • every version up to 5.4.45-0+deb7u6: fixed in 5.4.45-0+deb7u6
—
Debian:8(1)
PackageVulnerable rangeFix by version rangeDependents
php55.6.11+dfsg-1 ... 5.6.9+dfsg-1 (34 versions)
  • every version up to 5.6.26+dfsg-0+deb8u1: fixed in 5.6.26+dfsg-0+deb8u1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 22× 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 157 total refreshes for this CVE.

  1. 2026-10-05 17:38 UTCEPSS rescore
  2. 2026-10-04 21:48 UTCOSV refresh
  3. 2026-10-03 14:21 UTCEPSS rescore
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  6. 2026-09-30 09:15 UTCEG score recompute
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  4. 2026-08-27 06:34 UTCOSV refresh
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  30. 2026-07-25 20:01 UTCOSV refresh
  31. 2026-07-25 14:13 UTCEPSS rescore
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  34. 2026-07-23 01:24 UTCEG score recompute
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Frequently asked(5)

What is CVE-2016-7124?
CVE-2016-7124 is a critical vulnerability published on September 12, 2016. ext/standard/varunserializer.c in PHP before 5.6.25 and 7.x before 7.0.10 mishandles certain invalid objects, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via crafted serialized data that leads to a (1) _destruct call or (2) magic method call.
When was CVE-2016-7124 disclosed?
CVE-2016-7124 was first published on September 12, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-7124 actively exploited?
CVE-2016-7124 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17% probability of exploitation in the next 30 days (96th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2016-7124?
CVE-2016-7124 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-7124?
A fix for CVE-2016-7124 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2016-7124 are linked in the Vendor Advisories panel on this page.

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