CVE-2026-4648

MEDIUMPre-NVD 6.86.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 98% of all CVEs by exploit prediction. 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, secondary
Trending — 3 sources updated this week
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.8Exploit: None knownExposed: 0

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

Use of an insecure cryptographic algorithm in the cashless payment system using NFC wristbands from CasfID Servicios Tecnológicos S.L.U. (version used at Resurrection Fest 2025), which employs cards based on MIFARE Classic technology (FM11RF08S). The cryptographic weakness of the authentication algorithm allows an attacker to retrieve access keys using techniques known as Backdoored Nested Attack, read the wristband’s entire contents, and clone its credentials onto a compatible rewritable card. Exploitation of this vulnerability could enable the impersonation of other attendees, the fraudulent use of the balance associated with their wristbands, and financial losses for both the affected users and the event organizers.

CVSS v3
6.8
EG Score
6.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity68% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

July 28, 2026

Last Modified

July 28, 2026

Advisory Details (1)

Auto-updated Jul 28, 2026
No patch confirmed yet.
generic

Insufficient Encryption Level in CasfID Servicios Tecnológicos NFC Wristbands | INCIBE-CERT | INCIBE

https://www.incibe.es/en/incibe-cert/notices/aviso/insufficient-encryption-level-casfid-servicios-tecnologicos-nfc

Vendor Advisories for CVE-2026-4648(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 83× 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.

  1. 2026-08-29 23:35 UTCEG score recompute
  2. 2026-08-29 23:35 UTCGHSA enrichment
  3. 2026-08-28 21:41 UTCEPSS rescore
  4. 2026-08-27 21:58 UTCEG score recompute
  5. 2026-08-27 21:58 UTCGHSA enrichment
  6. 2026-08-27 14:25 UTCEPSS rescore
  7. 2026-08-26 23:20 UTCEG score recompute
  8. 2026-08-26 23:20 UTCGHSA enrichment
  9. 2026-08-26 14:46 UTCEPSS rescore
  10. 2026-08-26 00:41 UTCEG score recompute
  11. 2026-08-26 00:41 UTCGHSA enrichment
  12. 2026-08-25 13:49 UTCEPSS rescore
  13. 2026-08-25 02:01 UTCEG score recompute
  14. 2026-08-25 02:01 UTCGHSA enrichment
  15. 2026-08-24 03:23 UTCGHSA enrichment
  16. 2026-08-23 04:30 UTCEG score recompute
  17. 2026-08-23 04:30 UTCGHSA enrichment
  18. 2026-08-23 00:19 UTCEPSS rescore
  19. 2026-08-22 05:51 UTCEG score recompute
  20. 2026-08-22 05:51 UTCGHSA enrichment
  21. 2026-08-21 23:49 UTCEPSS rescore
  22. 2026-08-21 07:12 UTCEG score recompute
  23. 2026-08-21 07:12 UTCGHSA enrichment
  24. 2026-08-20 22:55 UTCEPSS rescore
  25. 2026-08-20 08:33 UTCEG score recompute
Show 68 more
  1. 2026-08-20 08:33 UTCGHSA enrichment
  2. 2026-08-19 17:04 UTCEPSS rescore
  3. 2026-08-19 09:54 UTCEG score recompute
  4. 2026-08-19 09:54 UTCGHSA enrichment
  5. 2026-08-18 13:48 UTCEPSS rescore
  6. 2026-08-18 11:16 UTCEG score recompute
  7. 2026-08-18 11:16 UTCGHSA enrichment
  8. 2026-08-17 13:47 UTCEPSS rescore
  9. 2026-08-17 12:33 UTCEG score recompute
  10. 2026-08-17 12:33 UTCGHSA enrichment
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 13:54 UTCEG score recompute
  13. 2026-08-16 13:54 UTCGHSA enrichment
  14. 2026-08-16 02:14 UTCEPSS rescore
  15. 2026-08-15 15:15 UTCEG score recompute
  16. 2026-08-15 15:15 UTCGHSA enrichment
  17. 2026-08-15 01:30 UTCEPSS rescore
  18. 2026-08-14 16:36 UTCEG score recompute
  19. 2026-08-14 16:36 UTCGHSA enrichment
  20. 2026-08-13 22:00 UTCEPSS rescore
  21. 2026-08-13 17:56 UTCGHSA enrichment
  22. 2026-08-12 19:17 UTCEG score recompute
  23. 2026-08-12 19:17 UTCGHSA enrichment
  24. 2026-08-12 13:51 UTCEPSS rescore
  25. 2026-08-11 20:38 UTCEG score recompute
  26. 2026-08-11 20:38 UTCGHSA enrichment
  27. 2026-08-11 00:00 UTCEPSS rescore
  28. 2026-08-10 22:00 UTCGHSA enrichment
  29. 2026-08-09 23:21 UTCEG score recompute
  30. 2026-08-09 23:21 UTCGHSA enrichment
  31. 2026-08-09 13:46 UTCEPSS rescore
  32. 2026-08-09 00:43 UTCEG score recompute
  33. 2026-08-09 00:43 UTCGHSA enrichment
  34. 2026-08-08 16:37 UTCEPSS rescore
  35. 2026-08-08 02:04 UTCEG score recompute
  36. 2026-08-08 02:04 UTCGHSA enrichment
  37. 2026-08-07 03:25 UTCEG score recompute
  38. 2026-08-07 03:25 UTCGHSA enrichment
  39. 2026-08-06 13:47 UTCEPSS rescore
  40. 2026-08-06 04:46 UTCEG score recompute
  41. 2026-08-06 04:46 UTCGHSA enrichment
  42. 2026-08-05 19:17 UTCEPSS rescore
  43. 2026-08-05 06:08 UTCEG score recompute
  44. 2026-08-05 06:07 UTCGHSA enrichment
  45. 2026-08-04 15:10 UTCEPSS rescore
  46. 2026-08-04 10:39 UTCEPSS rescore
  47. 2026-08-04 07:27 UTCEG score recompute
  48. 2026-08-04 07:26 UTCGHSA enrichment
  49. 2026-08-03 10:36 UTCEPSS rescore
  50. 2026-08-03 08:35 UTCGHSA enrichment
  51. 2026-08-02 09:55 UTCEG score recompute
  52. 2026-08-02 09:55 UTCGHSA enrichment
  53. 2026-08-02 02:27 UTCEPSS rescore
  54. 2026-08-01 11:16 UTCEG score recompute
  55. 2026-08-01 11:16 UTCGHSA enrichment
  56. 2026-08-01 04:16 UTCEPSS rescore
  57. 2026-07-31 12:38 UTCEG score recompute
  58. 2026-07-31 12:37 UTCGHSA enrichment
  59. 2026-07-30 16:28 UTCEPSS rescore
  60. 2026-07-30 13:58 UTCEG score recompute
  61. 2026-07-30 13:58 UTCGHSA enrichment
  62. 2026-07-30 01:30 UTCEPSS rescore
  63. 2026-07-29 15:19 UTCGHSA enrichment
  64. 2026-07-28 16:40 UTCGHSA enrichment
  65. 2026-07-28 13:37 UTCGHSA enrichment
  66. 2026-07-28 12:24 UTCEG score recompute
  67. 2026-07-28 11:51 UTCEG score recompute
  68. 2026-07-28 11:48 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-4648?
CVE-2026-4648 is a medium vulnerability published on July 28, 2026. Use of an insecure cryptographic algorithm in the cashless payment system using NFC wristbands from CasfID Servicios Tecnológicos S.L.U. (version used at Resurrection Fest 2025), which employs cards based on MIFARE Classic technology (FM11RF08S). The cryptographic weakness of the authentication…
When was CVE-2026-4648 disclosed?
CVE-2026-4648 was first published in the National Vulnerability Database on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-4648 actively exploited?
CVE-2026-4648 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 98.1% of all scored CVEs.
What is the CVSS score of CVE-2026-4648?
CVE-2026-4648 has a CVSS v3 base score of 6.8 (NVD).
How do I remediate CVE-2026-4648?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-4648, 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.

Dependency Blast Radius

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