CVE-2016-0998

CRITICALNVD 8.89.8▲
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-17. NVD baseline CVSS 8.8; sources differ by 1.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Exploit-DB (verified), epss top5pct, public exploit)
CISA-KEV: Not listedEPSS PROB: 30%CVSS: 8.8Exploit: Exploit-DB (verified) · epss top5pct · public exploitExposed: 0

A fix is available — apply it.

Use-after-free vulnerability in Adobe Flash Player before 18.0.0.333 and 19.x through 21.x before 21.0.0.182 on Windows and OS X and before 11.2.202.577 on Linux, Adobe AIR before 21.0.0.176, Adobe AIR SDK before 21.0.0.176, and Adobe AIR SDK & Compiler before 21.0.0.176 allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2016-0987, CVE-2016-0988, CVE-2016-0990, CVE-2016-0991, CVE-2016-0994, CVE-2016-0995, CVE-2016-0996, CVE-2016-0997, CVE-2016-0999, and CVE-2016-1000.

CVSS v3
8.8
EG Score
9.8(medium)
EG Risk
75(Track*)
EG Risk 75/100SSVC: 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%
Exploitation65% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
30%
EPSS %ILE
98%
KEV
Not listed

Published

March 12, 2016

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated May 9, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Adobe Flash - Object.unwatch Use-After-Free - Multiple remote Exploit

https://www.exploit-db.com/exploits/39631/
generic🟡 PoC Available

Adobe Flash - Uninitialized Stack Parameter Access in Object.unwatch UaF Fix - Windows dos Exploit

https://www.exploit-db.com/exploits/39612/
generic

Adobe Flash Player: Multiple vulnerabilities (GLSA 201603-07) — Gentoo security

https://security.gentoo.org/glsa/201603-07
generic
http://www.securityfocus.com/bid/84312

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatflash-plugin-0:11.2.202.577-1.el6_72016-03-11redhat

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(1)

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

Publicly available exploits

(2 references)

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

  • Exploit-DBEDB-39631✓ verified
    First seen Mar 29, 2016

    Adobe Flash - Object.unwatch Use-After-Free

    Open source ↗
  • Exploit-DBEDB-39612✓ verified
    First seen Mar 23, 2016

    Adobe Flash - Uninitialized Stack Parameter Access in Object.unwatch UaF Fix

    Open source ↗

Frequently asked(5)

What is CVE-2016-0998?
CVE-2016-0998 is a critical vulnerability published on March 12, 2016. Use-after-free vulnerability in Adobe Flash Player before 18.0.0.333 and 19.x through 21.x before 21.0.0.182 on Windows and OS X and before 11.2.202.577 on Linux, Adobe AIR before 21.0.0.176, Adobe AIR SDK before 21.0.0.176, and Adobe AIR SDK & Compiler before 21.0.0.176 allows attackers to execute…
When was CVE-2016-0998 disclosed?
CVE-2016-0998 was first published in the National Vulnerability Database on March 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-2016-0998 actively exploited?
CVE-2016-0998 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30% probability of exploitation in the next 30 days, which ranks it in the top 2.0% of all scored CVEs.
What is the CVSS score of CVE-2016-0998?
CVE-2016-0998 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.
How do I remediate CVE-2016-0998?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-0998, 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-2016-0998

Explore →

Is Your Infrastructure Affected by CVE-2016-0998?

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

Start Free Scan →Browse All CVEs