CVE-2016-4657

HIGHNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-05-24), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 sources updated this weekExploited in the wild
8.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 67%CVSS: 8.8Exploit: NoneExposed: 0

A fix is available — apply it.

WebKit in Apple iOS before 9.3.5 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site.

CVSS v3
8.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
99.2%
KEV
⚠ Exploited

Published

August 25, 2016

Last Modified

April 21, 2026

Advisory Details (4)

Auto-updated May 2, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic
http://www.securityfocus.com/bid/92653
generic
https://www.youtube.com/watch?v=xkdPjbaLngE
generic🟡 PoC Available

WebKit - not_number defineProperties UAF (Metasploit) - iOS remote Exploit

https://www.exploit-db.com/exploits/44836/
generic

About the security content of iOS 9.3.5 - Apple Support

https://support.apple.com/HT207107

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibwebkit2gtk-4.0-doc (2.14.2-0ubuntu0.16.04.1) @ xenial2026-07-20ubuntu

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.

Weakness Classification(2)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 74× in last 7d / 343× 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 661 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 20:52 UTCGHSA enrichment
  4. 2026-07-22 19:40 UTCCISA KEV update
  5. 2026-07-22 16:58 UTCEG score recompute
  6. 2026-07-22 16:58 UTCGHSA enrichment
  7. 2026-07-22 14:04 UTCEPSS rescore
  8. 2026-07-22 13:04 UTCGHSA enrichment
  9. 2026-07-22 09:11 UTCGHSA enrichment
  10. 2026-07-22 05:18 UTCGHSA enrichment
  11. 2026-07-22 01:03 UTCGHSA enrichment
  12. 2026-07-21 18:18 UTCGHSA enrichment
  13. 2026-07-21 14:37 UTCCISA KEV update
  14. 2026-07-21 14:25 UTCGHSA enrichment
  15. 2026-07-21 10:31 UTCGHSA enrichment
  16. 2026-07-21 06:37 UTCGHSA enrichment
  17. 2026-07-21 02:43 UTCGHSA enrichment
  18. 2026-07-20 22:50 UTCVendor advisory
  19. 2026-07-20 22:49 UTCGHSA enrichment
  20. 2026-07-20 18:56 UTCEG score recompute
  21. 2026-07-20 18:56 UTCVendor advisory
  22. 2026-07-20 18:56 UTCGHSA enrichment
  23. 2026-07-20 17:03 UTCEPSS rescore
  24. 2026-07-20 15:03 UTCGHSA enrichment
  25. 2026-07-20 11:07 UTCVendor advisory
Show 75 more
  1. 2026-07-20 11:07 UTCGHSA enrichment
  2. 2026-07-20 07:14 UTCVendor advisory
  3. 2026-07-20 07:14 UTCGHSA enrichment
  4. 2026-07-20 03:21 UTCVendor advisory
  5. 2026-07-20 03:20 UTCGHSA enrichment
  6. 2026-07-19 23:26 UTCVendor advisory
  7. 2026-07-19 23:26 UTCGHSA enrichment
  8. 2026-07-19 19:33 UTCVendor advisory
  9. 2026-07-19 19:33 UTCGHSA enrichment
  10. 2026-07-19 15:40 UTCVendor advisory
  11. 2026-07-19 15:40 UTCGHSA enrichment
  12. 2026-07-19 11:47 UTCVendor advisory
  13. 2026-07-19 11:47 UTCGHSA enrichment
  14. 2026-07-19 07:54 UTCVendor advisory
  15. 2026-07-19 07:54 UTCGHSA enrichment
  16. 2026-07-19 04:01 UTCVendor advisory
  17. 2026-07-19 04:01 UTCGHSA enrichment
  18. 2026-07-19 00:07 UTCGHSA enrichment
  19. 2026-07-18 20:13 UTCVendor advisory
  20. 2026-07-18 20:13 UTCGHSA enrichment
  21. 2026-07-18 16:20 UTCVendor advisory
  22. 2026-07-18 16:20 UTCGHSA enrichment
  23. 2026-07-18 12:27 UTCEG score recompute
  24. 2026-07-18 12:27 UTCVendor advisory
  25. 2026-07-18 12:27 UTCGHSA enrichment
  26. 2026-07-18 10:00 UTCEPSS rescore
  27. 2026-07-18 10:00 UTCEPSS rescore
  28. 2026-07-18 08:34 UTCVendor advisory
  29. 2026-07-18 08:34 UTCGHSA enrichment
  30. 2026-07-18 04:40 UTCVendor advisory
  31. 2026-07-18 04:40 UTCGHSA enrichment
  32. 2026-07-18 00:47 UTCVendor advisory
  33. 2026-07-18 00:47 UTCGHSA enrichment
  34. 2026-07-17 20:54 UTCVendor advisory
  35. 2026-07-17 20:54 UTCGHSA enrichment
  36. 2026-07-17 17:01 UTCGHSA enrichment
  37. 2026-07-17 13:08 UTCGHSA enrichment
  38. 2026-07-17 09:15 UTCEG score recompute
  39. 2026-07-17 09:15 UTCGHSA enrichment
  40. 2026-07-17 05:22 UTCGHSA enrichment
  41. 2026-07-17 01:28 UTCGHSA enrichment
  42. 2026-07-16 21:35 UTCVendor advisory
  43. 2026-07-16 21:35 UTCGHSA enrichment
  44. 2026-07-16 17:42 UTCVendor advisory
  45. 2026-07-16 17:42 UTCGHSA enrichment
  46. 2026-07-16 17:04 UTCCISA KEV update
  47. 2026-07-16 16:59 UTCEPSS rescore
  48. 2026-07-16 16:59 UTCEPSS rescore
  49. 2026-07-16 13:49 UTCGHSA enrichment
  50. 2026-07-16 09:54 UTCVendor advisory
  51. 2026-07-16 09:54 UTCGHSA enrichment
  52. 2026-07-16 06:00 UTCVendor advisory
  53. 2026-07-16 06:00 UTCGHSA enrichment
  54. 2026-07-16 02:07 UTCVendor advisory
  55. 2026-07-16 02:07 UTCGHSA enrichment
  56. 2026-07-15 22:14 UTCVendor advisory
  57. 2026-07-15 22:14 UTCGHSA enrichment
  58. 2026-07-15 18:21 UTCVendor advisory
  59. 2026-07-15 18:21 UTCGHSA enrichment
  60. 2026-07-15 16:54 UTCEPSS rescore
  61. 2026-07-15 16:54 UTCEPSS rescore
  62. 2026-07-15 16:49 UTCCISA KEV update
  63. 2026-07-15 15:04 UTCCISA KEV update
  64. 2026-07-15 14:27 UTCVendor advisory
  65. 2026-07-15 14:27 UTCGHSA enrichment
  66. 2026-07-15 10:34 UTCGHSA enrichment
  67. 2026-07-15 06:37 UTCGHSA enrichment
  68. 2026-07-15 02:43 UTCVendor advisory
  69. 2026-07-15 02:43 UTCGHSA enrichment
  70. 2026-07-14 22:51 UTCVendor advisory
  71. 2026-07-14 22:51 UTCGHSA enrichment
  72. 2026-07-14 18:57 UTCGHSA enrichment
  73. 2026-07-14 18:05 UTCCISA KEV update
  74. 2026-07-14 15:01 UTCGHSA enrichment
  75. 2026-07-14 11:07 UTCGHSA enrichment

Publicly available exploits

(6 references)

Working exploit code is in the public domain (1 Metasploit module) (3 GitHub PoCs) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCviai957/webkit-vulnerability
    First seen Nov 11, 2018

    CVE-2016-4657 web-kit vulnerability for ios 9.3, nintendo switch browser vulnerability

    Open source ↗
  • Exploit-DBEDB-44836✓ verified
    First seen Jun 5, 2018

    WebKit - not_number defineProperties UAF (Metasploit)

    Open source ↗
  • GitHub PoCiDaN5x/Switcheroo
    First seen Jun 2, 2017

    Exploiting CVE-2016-4657 to JailBreak the Nintendo Switch

    Open source ↗
  • GitHub PoCMimoja/CVE-2016-4657-NintendoSwitch
    First seen Mar 13, 2017

    CVE-2016-4657 for NintendoSwitch rwx

    Open source ↗
  • Exploit-DBEDB-44213
    First seen Mar 12, 2017

    Nintendo Switch - WebKit Code Execution (PoC)

    Open source ↗
  • Metasploitexploit/apple_ios/browser/webkit_trident✓ verified
    First seen Aug 25, 2016

    WebKit not_number defineProperties UAF

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2016-4657?
CVE-2016-4657 is a high vulnerability published on August 25, 2016. WebKit in Apple iOS before 9.3.5 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site.
When was CVE-2016-4657 disclosed?
CVE-2016-4657 was first published in the National Vulnerability Database on August 25, 2016, with the most recent update on April 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-4657 actively exploited?
Yes. CISA added CVE-2016-4657 to the Known Exploited Vulnerabilities catalog on May 24, 2022, affecting Apple iOS. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2016-4657?
CVE-2016-4657 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2016-4657?
CVE-2016-4657 affects Apple iOS. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2016-4657?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-4657, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2016-4657

Explore →

Is Your Infrastructure Affected by CVE-2016-4657?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs