CVE-2018-4990

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-06-08), 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 — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 37%CVSS: 8.8Exploit: cisa kev · ssvc active · epss top5pctExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Adobe Acrobat and Reader versions 2018.011.20038 and earlier, 2017.011.30079 and earlier, and 2015.006.30417 and earlier have a Double Free vulnerability. Successful exploitation could lead to arbitrary code execution in the context of the current user.

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 PROB
37%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

July 9, 2018

Last Modified

October 23, 2025

Advisory Details (3)

Auto-updated Jun 1, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-4990
generic
http://www.securitytracker.com/id/1040920
generic
http://www.securityfocus.com/bid/104167

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 54× in last 7d / 222× 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 626 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2018-4990?
CVE-2018-4990 is a critical vulnerability published on July 9, 2018. Adobe Acrobat and Reader versions 2018.011.20038 and earlier, 2017.011.30079 and earlier, and 2015.006.30417 and earlier have a Double Free vulnerability. Successful exploitation could lead to arbitrary code execution in the context of the current user.
When was CVE-2018-4990 disclosed?
CVE-2018-4990 was first published in the National Vulnerability Database on July 9, 2018, with the most recent update on October 23, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-4990 actively exploited?
Yes. CISA added CVE-2018-4990 to the Known Exploited Vulnerabilities catalog on June 8, 2022, affecting Adobe Acrobat and Reader. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2018-4990?
CVE-2018-4990 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-2018-4990?
CVE-2018-4990 affects Adobe Acrobat and Reader. 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-2018-4990?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-4990, 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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