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: 36%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
36%
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 / 226× 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 807 total refreshes for this CVE.

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

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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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