CVE-2018-4878

HIGHNVD 7.89.8▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.8 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
7.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 90%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

A use-after-free vulnerability was discovered in Adobe Flash Player before 28.0.0.161. This vulnerability occurs due to a dangling pointer in the Primetime SDK related to media player handling of listener objects. A successful attack can lead to arbitrary code execution. This was exploited in the wild in January and February 2018.

CVSS v3
7.8
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
99.8%
KEV
⚠ Exploited

Published

February 6, 2018

Last Modified

November 18, 2025

Advisory Details (8)

Auto-updated Jun 3, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: redhat.
generic🔴 Active Exploitation

Adobe Flash Player Zero-Day Spotted in the Wild | Threatpost

https://threatpost.com/adobe-flash-player-zero-day-spotted-in-the-wild/129742/
generic

GitHub - vysecurity/CVE-2018-4878: Aggressor Script to launch IE driveby for CVE-2018-4878 · GitHub

https://github.com/vysec/CVE-2018-4878
generic

malware-samples/CVE-2018-4878-Adobe-Flash-DRM-UAF-0day at master · InQuest/malware-samples · GitHub

https://github.com/InQuest/malware-samples/tree/master/CVE-2018-4878-Adobe-Flash-DRM-UAF-0day
generic

Morphisec Blog | The Latest in Ransomware and Cybersecurity

https://blog.morphisec.com/flash-exploit-cve-2018-4878-spotted-in-the-wild-massive-malspam-campaign
redhat Patch Available

Affected: Red Hat Enterprise Linux 6 Supplementary.

https://access.redhat.com/errata/RHSA-2018:0285
generic
http://www.securitytracker.com/id/1040318
generic
http://www.securityfocus.com/bid/102893
generic🔴 Active Exploitation

Flash 0-Day In The Wild: Group 123 At The Controls

http://blog.talosintelligence.com/2018/02/group-123-goes-wild.html

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatflash-plugin-0:28.0.0.161-1.el6_92018-02-07redhat

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 80× in last 7d / 362× 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 663 total refreshes for this CVE.

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

Publicly available exploits

(7 references)

Working exploit code is in the public domain (4 GitHub PoCs) (3 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCB0fH/CVE-2018-4878
    First seen Oct 17, 2018

    Metasploit module for CVE-2018-4878

    Open source ↗
  • Exploit-DBEDB-44412
    First seen Apr 6, 2018

    Adobe Flash < 28.0.0.161 - Use-After-Free

    Open source ↗
  • GitHub PoCSyFi/CVE-2018-4878
    First seen Apr 4, 2018

    Flash Exploit Poc

    Open source ↗
  • GitHub PoCvysecurity/CVE-2018-4878
    First seen Feb 10, 2018

    Aggressor Script to launch IE driveby for CVE-2018-4878

    Open source ↗
  • GitHub PoCmdsecactivebreach/CVE-2018-4878
    First seen Feb 9, 2018
    Open source ↗
  • Exploit-DBEDB-44744
    First seen Feb 16, 2016

    Flash ActiveX 28.0.0.137 - Code Execution (1)

    Open source ↗
  • Exploit-DBEDB-44745
    First seen Feb 13, 2016

    Flash ActiveX 28.0.0.137 - Code Execution (2)

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2018-4878?
CVE-2018-4878 is a high vulnerability published on February 6, 2018. A use-after-free vulnerability was discovered in Adobe Flash Player before 28.0.0.161. This vulnerability occurs due to a dangling pointer in the Primetime SDK related to media player handling of listener objects. A successful attack can lead to arbitrary code execution. This was exploited in the…
When was CVE-2018-4878 disclosed?
CVE-2018-4878 was first published in the National Vulnerability Database on February 6, 2018, with the most recent update on November 18, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-4878 actively exploited?
Yes. CISA added CVE-2018-4878 to the Known Exploited Vulnerabilities catalog on November 3, 2021, 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-2018-4878?
CVE-2018-4878 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.
Which products are affected by CVE-2018-4878?
CVE-2018-4878 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-2018-4878?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-4878, 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-2018-4878

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