CVE-2015-5123

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 2022-04-13), 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: 18%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Use-after-free vulnerability in the BitmapData class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.302 on Windows and OS X, 14.x through 18.0.0.203 on Windows and OS X, 11.x through 11.2.202.481 on Linux, and 12.x through 18.0.0.204 on Linux Chrome installations allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted Flash content that overrides a valueOf function, as exploited in the wild in July 2015.

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
96.9%
KEV
⚠ Exploited

Published

July 14, 2015

Last Modified

April 21, 2026

Advisory Details (6)

Auto-updated May 12, 2026
🔬 Proof of concept available. No patch confirmed yet. Sources: cert.
generic
http://www.securitytracker.com/id/1032890
generic
http://www.securityfocus.com/bid/75710
cert🟡 PoC Available

VU#918568 - Adobe Flash ActionScript 3 BitmapData memory corruption vulnerability

http://www.kb.cert.org/vuls/id/918568
generic
http://rhn.redhat.com/errata/RHSA-2015-1235.html
generic

'[security bulletin] HPSBMU03409 rev.1 - HP Matrix Operating Environment, Multiple Vulnerabilities' - MARC

http://marc.info/?l=bugtraq&m=144050155601375&w=2
generic

Research, News, and Perspectives | Trend Micro (US)

http://blog.trendmicro.com/trendlabs-security-intelligence/new-zero-day-vulnerability-cve-2015-5123-in-adobe-flash-emerges-from-hacking-team-leak/

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatflash-plugin-0:11.2.202.491-1.el6_62015-07-16redhat

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 100× in last 7d / 426× 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 795 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2015-5123?
CVE-2015-5123 is a critical vulnerability published on July 14, 2015. Use-after-free vulnerability in the BitmapData class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.302 on Windows and OS X, 14.x through 18.0.0.203 on Windows and OS X, 11.x through 11.2.202.481 on Linux, and 12.x through 18.0.0.204 on Linux Chrome…
When was CVE-2015-5123 disclosed?
CVE-2015-5123 was first published in the National Vulnerability Database on July 14, 2015, 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-2015-5123 actively exploited?
Yes. CISA added CVE-2015-5123 to the Known Exploited Vulnerabilities catalog on April 13, 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-2015-5123?
CVE-2015-5123 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2015-5123?
CVE-2015-5123 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-2015-5123?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-5123, 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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