CVE-2016-7480

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
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 42%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

The SplObjectStorage unserialize implementation in ext/spl/spl_observer.c in PHP before 7.0.12 does not verify that a key is an object, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized memory access) via crafted serialized data.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
65(Track*)
EG Risk 65/100SSVC: 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%
Exploitation42% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
98.5%
KEV
Not listed

Published

January 11, 2017

Last Modified

May 6, 2026

Advisory Details (7)

Auto-updated May 9, 2026
No patch confirmed yet.
generic

Check Point discovers three Zero-Day Vulnerabilities in web programming language PHP 7 - Check Point Blog

http://blog.checkpoint.com/2016/12/27/check-point-discovers-three-zero-day-vulnerabilities-web-programming-language-php-7
generic
https://www.youtube.com/watch?v=LDcaPstAuPk
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20180112-0001/
generic

Fix bug #73257 and bug #73258 - SplObjectStorage unserialize allows u… · php/php-src@61cdd12 · GitHub

https://github.com/php/php-src/commit/61cdd1255d5b9c8453be71aacbbf682796ac77d4
generic

PHP :: Sec Bug #73257 :: pointer to uninitialized memory passed to unserialize

https://bugs.php.net/bug.php?id=73257
generic
http://www.securityfocus.com/bid/95152
generic

PHP: PHP 7 ChangeLog

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

Data Freshness Timeline

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

Frequently asked(5)

What is CVE-2016-7480?
CVE-2016-7480 is a critical vulnerability published on January 11, 2017. The SplObjectStorage unserialize implementation in ext/spl/spl_observer.c in PHP before 7.0.12 does not verify that a key is an object, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized memory access) via crafted serialized data.
When was CVE-2016-7480 disclosed?
CVE-2016-7480 was first published in the National Vulnerability Database on January 11, 2017, 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-2016-7480 actively exploited?
CVE-2016-7480 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-7480?
CVE-2016-7480 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-7480?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-7480, 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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