CVE-2026-4793

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 97% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

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

An incorrect default permissions vulnerability in Synology Assistant before 7.0.7-50095 allows local users to read or write arbitrary files and conduct denial-of-service during installation.

CVSS v3
7.8
EG Score
7.8(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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 3, 2026

Last Modified

August 19, 2026

Advisory Details (1)

Auto-updated Aug 3, 2026
No patch confirmed yet.
generic

Synology_SA_26_12 | Synology Inc.

https://www.synology.com/en-global/security/advisory/Synology_SA_26_12

Vendor Advisories for CVE-2026-4793(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 30× in last 7d / 74× 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. 2026-08-20 20:10 UTCGHSA enrichment
  2. 2026-08-20 08:23 UTCGHSA enrichment
  3. 2026-08-19 20:36 UTCEG score recompute▲ 0.50
  4. 2026-08-19 20:36 UTCGHSA enrichment
  5. 2026-08-19 20:35 UTCNVD updateCVSS v3 → 7.8
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-19 11:16 UTCGHSA enrichment
  8. 2026-08-18 23:29 UTCEG score recompute
  9. 2026-08-18 23:29 UTCGHSA enrichment
  10. 2026-08-18 13:48 UTCEPSS rescore
  11. 2026-08-18 11:42 UTCGHSA enrichment
  12. 2026-08-17 23:55 UTCEG score recompute
  13. 2026-08-17 23:55 UTCGHSA enrichment
  14. 2026-08-17 13:47 UTCEPSS rescore
  15. 2026-08-17 12:07 UTCGHSA enrichment
  16. 2026-08-17 00:20 UTCEG score recompute
  17. 2026-08-17 00:20 UTCGHSA enrichment
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 12:33 UTCEG score recompute
  20. 2026-08-16 12:33 UTCGHSA enrichment
  21. 2026-08-16 02:14 UTCEPSS rescore
  22. 2026-08-16 00:46 UTCGHSA enrichment
  23. 2026-08-15 12:59 UTCEG score recompute
  24. 2026-08-15 12:59 UTCGHSA enrichment
  25. 2026-08-15 01:30 UTCEPSS rescore
Show 49 more
  1. 2026-08-15 01:11 UTCGHSA enrichment
  2. 2026-08-14 13:24 UTCGHSA enrichment
  3. 2026-08-14 01:37 UTCEG score recompute
  4. 2026-08-14 01:37 UTCGHSA enrichment
  5. 2026-08-13 22:00 UTCEPSS rescore
  6. 2026-08-13 13:50 UTCGHSA enrichment
  7. 2026-08-13 02:03 UTCGHSA enrichment
  8. 2026-08-12 14:16 UTCEG score recompute
  9. 2026-08-12 14:16 UTCGHSA enrichment
  10. 2026-08-12 13:51 UTCEPSS rescore
  11. 2026-08-12 02:28 UTCGHSA enrichment
  12. 2026-08-11 14:41 UTCGHSA enrichment
  13. 2026-08-11 02:54 UTCEG score recompute
  14. 2026-08-11 02:54 UTCGHSA enrichment
  15. 2026-08-11 00:00 UTCEPSS rescore
  16. 2026-08-10 15:07 UTCGHSA enrichment
  17. 2026-08-10 03:20 UTCGHSA enrichment
  18. 2026-08-09 15:34 UTCEG score recompute
  19. 2026-08-09 15:34 UTCGHSA enrichment
  20. 2026-08-09 13:46 UTCEPSS rescore
  21. 2026-08-09 03:47 UTCEG score recompute
  22. 2026-08-09 03:47 UTCGHSA enrichment
  23. 2026-08-08 16:37 UTCEPSS rescore
  24. 2026-08-08 16:00 UTCGHSA enrichment
  25. 2026-08-08 04:12 UTCEG score recompute
  26. 2026-08-08 04:12 UTCGHSA enrichment
  27. 2026-08-07 16:25 UTCGHSA enrichment
  28. 2026-08-07 04:38 UTCGHSA enrichment
  29. 2026-08-06 16:51 UTCEG score recompute
  30. 2026-08-06 16:51 UTCGHSA enrichment
  31. 2026-08-06 13:47 UTCEPSS rescore
  32. 2026-08-06 05:04 UTCEG score recompute
  33. 2026-08-06 05:04 UTCGHSA enrichment
  34. 2026-08-05 19:17 UTCEPSS rescore
  35. 2026-08-05 17:17 UTCGHSA enrichment
  36. 2026-08-05 05:29 UTCGHSA enrichment
  37. 2026-08-04 17:34 UTCEG score recompute
  38. 2026-08-04 17:34 UTCGHSA enrichment
  39. 2026-08-04 15:10 UTCEPSS rescore
  40. 2026-08-04 10:39 UTCEPSS rescore
  41. 2026-08-04 05:47 UTCGHSA enrichment
  42. 2026-08-03 18:00 UTCGHSA enrichment
  43. 2026-08-03 16:36 UTCEG score recompute
  44. 2026-08-03 16:36 UTCGHSA enrichment
  45. 2026-08-03 15:28 UTCEG score recompute
  46. 2026-08-03 15:28 UTCGHSA enrichment
  47. 2026-08-03 07:25 UTCEG score recompute
  48. 2026-08-03 06:33 UTCEG score recompute
  49. 2026-08-03 06:33 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-4793?
CVE-2026-4793 is a high vulnerability published on August 3, 2026. An incorrect default permissions vulnerability in Synology Assistant before 7.0.7-50095 allows local users to read or write arbitrary files and conduct denial-of-service during installation.
When was CVE-2026-4793 disclosed?
CVE-2026-4793 was first published in the National Vulnerability Database on August 3, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-4793 actively exploited?
CVE-2026-4793 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 96.7% of all scored CVEs.
What is the CVSS score of CVE-2026-4793?
CVE-2026-4793 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-4793?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-4793, 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-2026-4793

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