CVE-2016-4073

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
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 7%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Multiple integer overflows in the mbfl_strcut function in ext/mbstring/libmbfl/mbfl/mbfilter.c in PHP before 5.5.34, 5.6.x before 5.6.20, and 7.x before 7.0.5 allow remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted mb_strcut call.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
93.6%
KEV
Not listed

Published

May 20, 2016

Last Modified

May 6, 2026

Advisory Details (6)

Auto-updated May 8, 2026
No patch confirmed yet.
generic
http://www.securityfocus.com/bid/85991
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

oss-security - Re: CVE request: PHP issues fixed in 7.0.5, 5.6.20 and 5.5.34 releases

http://www.openwall.com/lists/oss-security/2016/04/24/1
generic

[SECURITY] [DSA 3560-1] php5 security update

http://www.debian.org/security/2016/dsa-3560
generic
http://rhn.redhat.com/errata/RHSA-2016-2750.html

Vendor Advisories for CVE-2016-4073(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 / EcosystemFixed in / PatchReleasedSource
ubuntuphp7.0-zip (7.0.4-7ubuntu2.1) @ 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.

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 7× in last 7d / 36× 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.

  1. 2026-07-07 13:42 UTCEPSS rescore
  2. 2026-07-06 16:24 UTCEPSS rescore
  3. 2026-07-06 16:24 UTCEPSS rescore
  4. 2026-07-05 02:27 UTCEPSS rescore
  5. 2026-07-04 06:28 UTCEPSS rescore
  6. 2026-07-01 15:02 UTCEPSS rescore
  7. 2026-06-30 23:19 UTCEPSS rescore
  8. 2026-06-29 14:03 UTCEPSS rescore
  9. 2026-06-28 14:04 UTCEPSS rescore
  10. 2026-06-28 04:53 UTCEPSS rescore
  11. 2026-06-27 03:05 UTCEPSS rescore
  12. 2026-06-27 03:05 UTCEPSS rescore
  13. 2026-06-25 13:47 UTCEPSS rescore
  14. 2026-06-25 13:47 UTCEPSS rescore
  15. 2026-06-24 14:02 UTCEPSS rescore
  16. 2026-06-24 14:02 UTCEPSS rescore
  17. 2026-06-23 21:30 UTCEPSS rescore
  18. 2026-06-22 14:23 UTCEPSS rescore
  19. 2026-06-19 19:23 UTCEPSS rescore
  20. 2026-06-19 19:23 UTCEPSS rescore
  21. 2026-06-19 10:25 UTCOSV refresh
  22. 2026-06-18 17:50 UTCEPSS rescore
  23. 2026-06-17 17:50 UTCEPSS rescore
  24. 2026-06-17 17:50 UTCEPSS rescore
  25. 2026-06-16 17:50 UTCEPSS rescore
Show 71 more
  1. 2026-06-16 17:50 UTCEPSS rescore
  2. 2026-06-15 17:45 UTCEPSS rescore
  3. 2026-06-14 23:14 UTCEPSS rescore
  4. 2026-06-13 22:57 UTCEPSS rescore
  5. 2026-06-13 22:57 UTCEPSS rescore
  6. 2026-06-12 23:09 UTCEPSS rescore
  7. 2026-06-12 23:09 UTCEPSS rescore
  8. 2026-06-11 13:57 UTCEPSS rescore
  9. 2026-06-10 22:15 UTCEPSS rescore
  10. 2026-06-10 13:18 UTCEPSS rescore
  11. 2026-06-08 14:14 UTCEPSS rescore
  12. 2026-06-07 15:22 UTCEPSS rescore
  13. 2026-06-07 15:22 UTCEPSS rescore
  14. 2026-06-05 22:44 UTCEPSS rescore
  15. 2026-06-05 06:08 UTCEPSS rescore
  16. 2026-06-05 06:08 UTCEPSS rescore
  17. 2026-06-04 13:10 UTCEPSS rescore
  18. 2026-06-04 13:10 UTCEPSS rescore
  19. 2026-06-02 20:10 UTCEPSS rescore
  20. 2026-06-01 13:49 UTCEPSS rescore
  21. 2026-06-01 13:49 UTCEPSS rescore
  22. 2026-05-31 22:28 UTCEPSS rescore
  23. 2026-05-31 22:28 UTCEPSS rescore
  24. 2026-05-31 00:14 UTCEPSS rescore
  25. 2026-05-30 19:23 UTCOSV refresh
  26. 2026-05-29 13:41 UTCEPSS rescore
  27. 2026-05-28 13:42 UTCEPSS rescore
  28. 2026-05-28 13:42 UTCEPSS rescore
  29. 2026-05-27 13:38 UTCEPSS rescore
  30. 2026-05-27 13:38 UTCEPSS rescore
  31. 2026-05-26 13:42 UTCEPSS rescore
  32. 2026-05-26 07:16 UTCEPSS rescore
  33. 2026-05-24 16:43 UTCEPSS rescore
  34. 2026-05-22 21:15 UTCEPSS rescore
  35. 2026-05-22 21:15 UTCEPSS rescore
  36. 2026-05-21 22:40 UTCEPSS rescore
  37. 2026-05-20 22:37 UTCEPSS rescore
  38. 2026-05-20 22:37 UTCEPSS rescore
  39. 2026-05-20 22:37 UTCEPSS rescore
  40. 2026-05-20 11:21 UTCEPSS rescore
  41. 2026-05-20 11:21 UTCEPSS rescore
  42. 2026-05-20 11:21 UTCEPSS rescore
  43. 2026-05-20 07:57 UTCEG score recompute
  44. 2026-05-20 07:57 UTCVendor advisory
  45. 2026-05-20 07:57 UTCGHSA enrichment
  46. 2026-05-20 04:07 UTCEG score recompute
  47. 2026-05-20 04:07 UTCVendor advisory
  48. 2026-05-20 04:07 UTCGHSA enrichment
  49. 2026-05-20 00:17 UTCEG score recompute
  50. 2026-05-20 00:17 UTCVendor advisory
  51. 2026-05-20 00:17 UTCGHSA enrichment
  52. 2026-05-19 20:27 UTCEG score recompute
  53. 2026-05-19 20:27 UTCVendor advisory
  54. 2026-05-19 20:27 UTCGHSA enrichment
  55. 2026-05-19 16:33 UTCEG score recompute
  56. 2026-05-19 16:33 UTCVendor advisory
  57. 2026-05-19 16:33 UTCGHSA enrichment
  58. 2026-05-19 12:43 UTCEG score recompute
  59. 2026-05-19 12:43 UTCVendor advisory
  60. 2026-05-19 12:43 UTCGHSA enrichment
  61. 2026-05-19 08:39 UTCEG score recompute
  62. 2026-05-19 08:39 UTCVendor advisory
  63. 2026-05-19 08:39 UTCGHSA enrichment
  64. 2026-05-19 04:49 UTCEG score recompute
  65. 2026-05-19 04:49 UTCVendor advisory
  66. 2026-05-19 04:49 UTCGHSA enrichment
  67. 2026-05-19 00:57 UTCEG score recompute
  68. 2026-05-19 00:57 UTCVendor advisory
  69. 2026-05-19 00:57 UTCGHSA enrichment
  70. 2026-05-18 21:30 UTCEPSS rescore
  71. 2026-05-18 21:30 UTCEPSS rescore

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2016-4073?
CVE-2016-4073 is a critical vulnerability published on May 20, 2016. Multiple integer overflows in the mbflstrcut function in ext/mbstring/libmbfl/mbfl/mbfilter.c in PHP before 5.5.34, 5.6.x before 5.6.20, and 7.x before 7.0.5 allow remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted mbstrcut call.
When was CVE-2016-4073 disclosed?
CVE-2016-4073 was first published in the National Vulnerability Database on May 20, 2016, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-4073 actively exploited?
CVE-2016-4073 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 93.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-4073?
CVE-2016-4073 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-4073?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-4073, 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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