CVE-2016-4171

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-03-25), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 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
9.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 20%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Unspecified vulnerability in Adobe Flash Player 21.0.0.242 and earlier allows remote attackers to execute arbitrary code via unknown vectors, as exploited in the wild in June 2016.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
84(Attend)
EG Risk 84/100SSVC: 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
Severity98% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
97.2%
KEV
⚠ Exploited

Published

June 16, 2016

Last Modified

April 21, 2026

Advisory Details (5)

Auto-updated May 12, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: redhat, cert.
cert🔴 Active Exploitation

VU#748992 - Adobe Flash memory corruption vulnerability

https://www.kb.cert.org/vuls/id/748992
generic

Adobe Flash Player: Multiple vulnerabilities (GLSA 201606-08) — Gentoo security

https://security.gentoo.org/glsa/201606-08
redhat Patch Available

Affected: Red Hat Enterprise Linux 5

https://access.redhat.com/errata/RHSA-2016:1238
generic
http://www.securitytracker.com/id/1036094
generic
http://www.securityfocus.com/bid/91184

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatflash-plugin-0:11.2.202.626-1.el6_82016-06-17redhat

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.

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 70× in last 7d / 395× 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 785 total refreshes for this CVE.

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

Frequently asked(6)

What is CVE-2016-4171?
CVE-2016-4171 is a critical vulnerability published on June 16, 2016. Unspecified vulnerability in Adobe Flash Player 21.0.0.242 and earlier allows remote attackers to execute arbitrary code via unknown vectors, as exploited in the wild in June 2016.
When was CVE-2016-4171 disclosed?
CVE-2016-4171 was first published in the National Vulnerability Database on June 16, 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-2016-4171 actively exploited?
Yes. CISA added CVE-2016-4171 to the Known Exploited Vulnerabilities catalog on March 25, 2022, affecting Adobe Flash Player. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2016-4171?
CVE-2016-4171 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2016-4171?
CVE-2016-4171 affects Adobe Flash Player. 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-2016-4171?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-4171, 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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