CVE-2016-9026

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.3% (69th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.3%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Exponent CMS before 2.6.0 has improper input validation in fileController.php.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
49
EG Risk 49/100CISA SSVC

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%
Exploitation1% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.3%
EPSS %ILE
69th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

December 31, 2020

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Sep 29, 2026
Patch available. Sources: github_commit.
github_commit Patch Available

commit a8efd9ca71fc (exponentcms/exponent-cms)

Patch available: exponentcms/exponent-cms v2.4.3 (contains commit a8efd9ca71fc)

https://github.com/exponentcms/exponent-cms/commit/a8efd9ca71fc9b8b843ad0910d435d237482ee31
generic

Changeset: Changeset [a8efd9ca71fc9b8b843ad0910d435d237482ee31] by dleffler - Exponent CMS - exponentcms

https://exponentcms.lighthouseapp.com/projects/61783/changesets/a8efd9ca71fc9b8b843ad0910d435d237482ee31

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 25× 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 150 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2016-9026?
CVE-2016-9026 is a critical vulnerability published on December 31, 2020. Exponent CMS before 2.6.0 has improper input validation in fileController.php.
When was CVE-2016-9026 disclosed?
CVE-2016-9026 was first published on December 31, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-9026 actively exploited?
CVE-2016-9026 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.3% probability of exploitation in the next 30 days (69th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2016-9026?
CVE-2016-9026 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-9026?
A fix for CVE-2016-9026 is available: update to the fixed version the vendor names in its advisory.

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