CVE-2026-6257

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-20. the CNA's CVSS baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 0

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

Vvveb CMS v1.0.8.2 contains a remote code execution vulnerability in its media management functionality where a missing return statement in the file rename handler allows authenticated attackers to rename files to blocked extensions .php or .htaccess. Attackers can exploit this logic flaw by first uploading a text file and renaming it to .htaccess to inject Apache directives that register PHP-executable MIME types, then uploading another file and renaming it to .php to execute arbitrary operating system commands as the www-data user.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: Track

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
Severity91% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

April 20, 2026

Last Modified

July 14, 2026

Advisory Details (2)

Auto-updated Sep 7, 2026
Patch available. Sources: github_commit.
generic

Vvveb < 1.0.8.2 RCE via Media Management | Advisories | VulnCheck

https://www.vulncheck.com/advisories/vvveb-cms-remote-code-execution-via-media-management
github_commit Patch Available

commit 6fb8eaa99826 (givanz/Vvveb)

Patch available: givanz/Vvveb 1.0.8.1 (contains commit 6fb8eaa99826)

https://github.com/givanz/Vvveb/commit/6fb8eaa998265e33e8802cbc220d8859dbc144f2

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 4× in last 7d / 27× 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 247 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-6257?
CVE-2026-6257 is a critical vulnerability published on April 20, 2026. Vvveb CMS v1.0.8.2 contains a remote code execution vulnerability in its media management functionality where a missing return statement in the file rename handler allows authenticated attackers to rename files to blocked extensions .php or .htaccess. Attackers can exploit this logic flaw by first…
When was CVE-2026-6257 disclosed?
CVE-2026-6257 was first published in the National Vulnerability Database on April 20, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6257 actively exploited?
CVE-2026-6257 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 51.6% of all scored CVEs.
What is the CVSS score of CVE-2026-6257?
CVE-2026-6257 has a CVSS v4.0 base score of 9.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-6257?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6257, 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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