CVE-2025-66593

MEDIUMNVD 5.66.1▲
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2026-05-27. NVD baseline CVSS 5.6; sources differ by 0.5.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.6
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.6Exploit: NoneExposed: 0

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

An origin validation error vulnerability in Synology Assistant before 7.0.6-50085 allows local users to write arbitrary files with restricted content and conduct denial-of-service during installation.

CVSS v3
5.6
EG Score
6.1(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
0.4%
KEV
Not listed

Published

May 27, 2026

Last Modified

June 2, 2026

Advisory Details (1)

Auto-updated Jun 14, 2026
No patch confirmed yet.
generic

Synology_SA_25_17 | Synology Inc.

https://www.synology.com/en-global/security/advisory/Synology_SA_25_17

Vendor Advisories for CVE-2025-66593(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 10× in last 7d / 37× 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. 2026-07-23 14:18 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 03:01 UTCEG score recompute
  4. 2026-07-22 14:08 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-19 14:30 UTCEPSS rescore
  7. 2026-07-19 14:30 UTCEPSS rescore
  8. 2026-07-18 10:04 UTCEPSS rescore
  9. 2026-07-18 10:04 UTCEPSS rescore
  10. 2026-07-16 17:02 UTCEPSS rescore
  11. 2026-07-15 16:57 UTCEPSS rescore
  12. 2026-07-15 16:57 UTCEPSS rescore
  13. 2026-07-13 22:29 UTCEPSS rescore
  14. 2026-07-13 06:12 UTCEPSS rescore
  15. 2026-07-11 08:27 UTCEPSS rescore
  16. 2026-07-09 19:09 UTCEPSS rescore
  17. 2026-07-08 15:15 UTCEPSS rescore
  18. 2026-07-07 13:46 UTCEPSS rescore
  19. 2026-07-06 16:27 UTCEPSS rescore
  20. 2026-07-06 16:27 UTCEPSS rescore
  21. 2026-07-05 02:30 UTCEPSS rescore
  22. 2026-07-05 02:30 UTCEPSS rescore
  23. 2026-07-04 06:31 UTCEPSS rescore
  24. 2026-07-04 06:30 UTCEPSS rescore
  25. 2026-07-01 15:06 UTCEPSS rescore
Show 69 more
  1. 2026-07-01 15:06 UTCEPSS rescore
  2. 2026-07-01 11:41 UTCGHSA enrichment
  3. 2026-06-30 23:22 UTCEPSS rescore
  4. 2026-06-29 14:40 UTCGHSA enrichment
  5. 2026-06-28 08:44 UTCGHSA enrichment
  6. 2026-06-28 04:56 UTCEPSS rescore
  7. 2026-06-28 04:55 UTCEPSS rescore
  8. 2026-06-27 06:45 UTCGHSA enrichment
  9. 2026-06-26 04:18 UTCGHSA enrichment
  10. 2026-06-25 02:19 UTCGHSA enrichment
  11. 2026-06-23 21:32 UTCEPSS rescore
  12. 2026-06-23 21:32 UTCEPSS rescore
  13. 2026-06-21 01:59 UTCEPSS rescore
  14. 2026-06-21 01:59 UTCEPSS rescore
  15. 2026-06-19 19:25 UTCEPSS rescore
  16. 2026-06-19 19:25 UTCEPSS rescore
  17. 2026-06-18 17:52 UTCEPSS rescore
  18. 2026-06-18 17:52 UTCEPSS rescore
  19. 2026-06-17 17:52 UTCEPSS rescore
  20. 2026-06-17 11:51 UTCGHSA enrichment
  21. 2026-06-16 09:53 UTCGHSA enrichment
  22. 2026-06-15 17:48 UTCEPSS rescore
  23. 2026-06-15 17:48 UTCEPSS rescore
  24. 2026-06-15 06:56 UTCGHSA enrichment
  25. 2026-06-14 23:18 UTCEPSS rescore
  26. 2026-06-14 04:56 UTCGHSA enrichment
  27. 2026-06-13 23:00 UTCEPSS rescore
  28. 2026-06-13 23:00 UTCEPSS rescore
  29. 2026-06-13 02:58 UTCGHSA enrichment
  30. 2026-06-12 23:11 UTCEPSS rescore
  31. 2026-06-12 00:59 UTCGHSA enrichment
  32. 2026-06-11 14:00 UTCEPSS rescore
  33. 2026-06-10 23:00 UTCGHSA enrichment
  34. 2026-06-10 22:18 UTCEPSS rescore
  35. 2026-06-10 22:18 UTCEPSS rescore
  36. 2026-06-10 13:22 UTCEPSS rescore
  37. 2026-06-09 21:01 UTCGHSA enrichment
  38. 2026-06-08 23:31 UTCNVD updateCVSS v3 → 5.6
  39. 2026-06-08 18:58 UTCGHSA enrichment
  40. 2026-06-07 15:24 UTCEPSS rescore
  41. 2026-06-07 15:24 UTCEPSS rescore
  42. 2026-06-07 13:40 UTCGHSA enrichment
  43. 2026-06-06 13:47 UTCEPSS rescore
  44. 2026-06-06 13:47 UTCEPSS rescore
  45. 2026-06-06 11:41 UTCGHSA enrichment
  46. 2026-06-05 09:43 UTCGHSA enrichment
  47. 2026-06-05 06:10 UTCEPSS rescore
  48. 2026-06-05 06:10 UTCEPSS rescore
  49. 2026-06-04 13:12 UTCEPSS rescore
  50. 2026-06-04 13:12 UTCEPSS rescore
  51. 2026-06-04 07:44 UTCGHSA enrichment
  52. 2026-06-03 05:45 UTCGHSA enrichment
  53. 2026-06-02 20:13 UTCEPSS rescore
  54. 2026-06-02 20:12 UTCEPSS rescore
  55. 2026-06-02 03:46 UTCGHSA enrichment
  56. 2026-06-01 13:51 UTCEPSS rescore
  57. 2026-06-01 13:51 UTCEPSS rescore
  58. 2026-06-01 01:48 UTCGHSA enrichment
  59. 2026-05-31 00:16 UTCEPSS rescore
  60. 2026-05-31 00:16 UTCEPSS rescore
  61. 2026-05-29 13:44 UTCEPSS rescore
  62. 2026-05-28 13:44 UTCEPSS rescore
  63. 2026-05-28 13:44 UTCEPSS rescore
  64. 2026-05-28 13:44 UTCEPSS rescore
  65. 2026-05-27 13:40 UTCEPSS rescore
  66. 2026-05-27 13:40 UTCEPSS rescore
  67. 2026-05-27 13:40 UTCEPSS rescore
  68. 2026-05-27 13:40 UTCEPSS rescore
  69. 2026-05-27 08:59 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-66593?
CVE-2025-66593 is a medium vulnerability published on May 27, 2026. An origin validation error vulnerability in Synology Assistant before 7.0.6-50085 allows local users to write arbitrary files with restricted content and conduct denial-of-service during installation.
When was CVE-2025-66593 disclosed?
CVE-2025-66593 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on June 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-66593 actively exploited?
CVE-2025-66593 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-66593?
CVE-2025-66593 has a CVSS v3 base score of 5.6 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.1.
How do I remediate CVE-2025-66593?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-66593, 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

Explore the affected products and dependency analysis for CVE-2025-66593

Explore →

Is Your Infrastructure Affected by CVE-2025-66593?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs