CVE-2026-18759

HIGHPre-NVD 8.58.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.5 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
8.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.5Exploit: None knownExposed: 0

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

The background service of ABP or AES runs as NT AUTHORITY\SYSTEM and implements a file-based inter-process communication (IPC) mechanism protected by AES encryption. Because the encryption key file is readable by standard users and protected using DPAPI. Any authenticated local user can recover the key and forge valid IPC requests. Furthermore, the service does not check the identity of the requesting process and validates destination paths using an insufficient substring check. A local attacker can submit crafted encrypted requests containing directory traversal sequences to perform arbitrary file reads and arbitrary file writes as NT AUTHORITY\SYSTEM, leading to full local privilege escalation. Affected products and versions include: ABP (ASUSTOR Backup Plan) 2.0.7.10171 and earlier as well as AES (ASUSTOR EZSync) 1.1.1.3113 and earlier.

CVSS v3
8.5
EG Score
8.5(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity85% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

August 4, 2026

Last Modified

August 4, 2026

Advisory Details (1)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

AS-2026-021: ABP and AES | ASUSTOR NAS

https://www.asustor.com/security/security_advisory_detail?id=70

Vendor Advisories for CVE-2026-18759(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 29× in last 7d / 78× 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. 2026-08-21 06:45 UTCEG score recompute
  2. 2026-08-21 06:45 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 19:21 UTCGHSA enrichment
  5. 2026-08-20 07:57 UTCGHSA enrichment
  6. 2026-08-19 20:33 UTCEG score recompute
  7. 2026-08-19 20:33 UTCGHSA enrichment
  8. 2026-08-19 17:03 UTCEPSS rescore
  9. 2026-08-19 09:08 UTCGHSA enrichment
  10. 2026-08-18 21:43 UTCEG score recompute
  11. 2026-08-18 21:43 UTCGHSA enrichment
  12. 2026-08-18 13:48 UTCEPSS rescore
  13. 2026-08-18 10:08 UTCGHSA enrichment
  14. 2026-08-17 22:40 UTCEG score recompute
  15. 2026-08-17 22:40 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 11:15 UTCGHSA enrichment
  18. 2026-08-16 23:52 UTCEG score recompute
  19. 2026-08-16 23:52 UTCGHSA enrichment
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 12:27 UTCEG score recompute
  22. 2026-08-16 12:27 UTCGHSA enrichment
  23. 2026-08-16 02:14 UTCEPSS rescore
  24. 2026-08-16 01:04 UTCGHSA enrichment
  25. 2026-08-15 13:40 UTCGHSA enrichment
Show 53 more
  1. 2026-08-15 02:15 UTCEG score recompute
  2. 2026-08-15 02:15 UTCGHSA enrichment
  3. 2026-08-15 01:30 UTCEPSS rescore
  4. 2026-08-14 14:51 UTCGHSA enrichment
  5. 2026-08-14 03:27 UTCEG score recompute
  6. 2026-08-14 03:27 UTCGHSA enrichment
  7. 2026-08-13 22:00 UTCEPSS rescore
  8. 2026-08-13 16:03 UTCGHSA enrichment
  9. 2026-08-13 04:36 UTCGHSA enrichment
  10. 2026-08-12 17:12 UTCEG score recompute
  11. 2026-08-12 17:12 UTCGHSA enrichment
  12. 2026-08-12 13:50 UTCEPSS rescore
  13. 2026-08-12 05:48 UTCGHSA enrichment
  14. 2026-08-11 18:24 UTCEG score recompute
  15. 2026-08-11 18:24 UTCGHSA enrichment
  16. 2026-08-11 13:42 UTCEPSS rescore
  17. 2026-08-11 06:58 UTCEG score recompute
  18. 2026-08-11 06:58 UTCGHSA enrichment
  19. 2026-08-11 00:00 UTCEPSS rescore
  20. 2026-08-10 19:34 UTCGHSA enrichment
  21. 2026-08-10 08:09 UTCGHSA enrichment
  22. 2026-08-09 20:45 UTCEG score recompute
  23. 2026-08-09 20:45 UTCGHSA enrichment
  24. 2026-08-09 13:46 UTCEPSS rescore
  25. 2026-08-09 09:21 UTCGHSA enrichment
  26. 2026-08-08 21:57 UTCEG score recompute
  27. 2026-08-08 21:57 UTCGHSA enrichment
  28. 2026-08-08 16:37 UTCEPSS rescore
  29. 2026-08-08 10:32 UTCGHSA enrichment
  30. 2026-08-07 23:08 UTCGHSA enrichment
  31. 2026-08-07 11:44 UTCGHSA enrichment
  32. 2026-08-07 00:20 UTCEG score recompute
  33. 2026-08-07 00:20 UTCGHSA enrichment
  34. 2026-08-06 13:46 UTCEPSS rescore
  35. 2026-08-06 12:56 UTCGHSA enrichment
  36. 2026-08-06 01:33 UTCEG score recompute
  37. 2026-08-06 01:32 UTCGHSA enrichment
  38. 2026-08-05 19:17 UTCEPSS rescore
  39. 2026-08-05 14:08 UTCGHSA enrichment
  40. 2026-08-05 01:42 UTCEG score recompute
  41. 2026-08-05 01:42 UTCGHSA enrichment
  42. 2026-08-04 15:10 UTCEPSS rescore
  43. 2026-08-04 14:18 UTCEG score recompute
  44. 2026-08-04 14:18 UTCGHSA enrichment
  45. 2026-08-04 13:59 UTCEG score recompute
  46. 2026-08-04 13:59 UTCGHSA enrichment
  47. 2026-08-04 11:25 UTCGHSA enrichment
  48. 2026-08-04 10:31 UTCEG score recompute
  49. 2026-08-04 10:31 UTCGHSA enrichment
  50. 2026-08-04 09:29 UTCEG score recompute
  51. 2026-08-04 08:19 UTCEG score recompute
  52. 2026-08-04 07:31 UTCEG score recompute
  53. 2026-08-04 07:28 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-18759?
CVE-2026-18759 is a high vulnerability published on August 4, 2026. The background service of ABP or AES runs as NT AUTHORITY\SYSTEM and implements a file-based inter-process communication (IPC) mechanism protected by AES encryption. Because the encryption key file is readable by standard users and protected using DPAPI. Any authenticated local user can recover the…
When was CVE-2026-18759 disclosed?
CVE-2026-18759 was first published in the National Vulnerability Database on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18759 actively exploited?
CVE-2026-18759 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-2026-18759?
CVE-2026-18759 has a CVSS v3 base score of 8.5 (NVD).
How do I remediate CVE-2026-18759?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18759, 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-2026-18759

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