CVE-2023-26359

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 2023-08-21), 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 — 4 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

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

Adobe ColdFusion versions 2018 Update 15 (and earlier) and 2021 Update 5 (and earlier) are affected by a Deserialization of Untrusted Data vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue does not require user interaction.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS
96.9%
KEV
⚠ Exploited

Published

March 23, 2023

Last Modified

October 23, 2025

Advisory Details (1)

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-2023-26359

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 52× in last 7d / 224× 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 417 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2023-26359?
CVE-2023-26359 is a critical vulnerability published on March 23, 2023. Adobe ColdFusion versions 2018 Update 15 (and earlier) and 2021 Update 5 (and earlier) are affected by a Deserialization of Untrusted Data vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue does not require user interaction.
When was CVE-2023-26359 disclosed?
CVE-2023-26359 was first published in the National Vulnerability Database on March 23, 2023, 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-2023-26359 actively exploited?
Yes. CISA added CVE-2023-26359 to the Known Exploited Vulnerabilities catalog on August 21, 2023, affecting Adobe ColdFusion. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-26359?
CVE-2023-26359 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2023-26359?
CVE-2023-26359 affects Adobe ColdFusion. 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-2023-26359?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-26359, 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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