CVE-2026-12858

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% (below the 1st percentile of EPSS-scored CVEs). 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 mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 8.5Exploit: None knownExposed services: Not assessed

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

Improper Privilege Management vulnerability in ESET AV Remover (standalone) allows Privilege Escalation via especially crafted RPC.

CVSS v3
8.5
EG Score
8.5HIGHmedium confidence
EG Risk
38
EG Risk 38/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.1%
EPSS %ILE
below the 1st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 9, 2026

Last Modified

September 9, 2026

Advisory Details (1)

Auto-updated Sep 9, 2026
No patch confirmed yet.
generic

[CA9000] ESET Customer Advisory: Local privilege escalation vulnerability in ESET AV Remover fixed

https://support.eset.com/en/ca9000-eset-customer-advisory-local-privilege-escalation-vulnerability-in-eset-av-remover-fixed

Vendor Advisories for CVE-2026-12858(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 26× in last 7d / 99× 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. 2026-10-04 11:24 UTCGHSA enrichment
  2. 2026-10-04 00:24 UTCEG score recompute
  3. 2026-10-04 00:24 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-03 12:12 UTCGHSA enrichment
  6. 2026-10-03 00:12 UTCEG score recompute
  7. 2026-10-03 00:12 UTCGHSA enrichment
  8. 2026-10-02 12:37 UTCGHSA enrichment
  9. 2026-10-02 00:24 UTCEG score recompute
  10. 2026-10-02 00:24 UTCGHSA enrichment
  11. 2026-10-01 19:49 UTCEPSS rescore
  12. 2026-10-01 12:13 UTCGHSA enrichment
  13. 2026-10-01 01:12 UTCEG score recompute
  14. 2026-10-01 01:12 UTCGHSA enrichment
  15. 2026-09-30 15:02 UTCEPSS rescore
  16. 2026-09-30 14:12 UTCGHSA enrichment
  17. 2026-09-30 02:05 UTCEG score recompute
  18. 2026-09-30 02:05 UTCGHSA enrichment
  19. 2026-09-29 15:20 UTCEPSS rescore
  20. 2026-09-29 14:17 UTCGHSA enrichment
  21. 2026-09-29 03:16 UTCEG score recompute
  22. 2026-09-29 03:16 UTCGHSA enrichment
  23. 2026-09-28 16:13 UTCGHSA enrichment
  24. 2026-09-28 05:13 UTCGHSA enrichment
  25. 2026-09-27 18:13 UTCEG score recompute
Show 74 more
  1. 2026-09-27 18:13 UTCGHSA enrichment
  2. 2026-09-27 07:13 UTCGHSA enrichment
  3. 2026-09-26 20:12 UTCEG score recompute
  4. 2026-09-26 20:12 UTCGHSA enrichment
  5. 2026-09-26 15:58 UTCEPSS rescore
  6. 2026-09-26 08:37 UTCGHSA enrichment
  7. 2026-09-25 21:28 UTCGHSA enrichment
  8. 2026-09-25 08:48 UTCGHSA enrichment
  9. 2026-09-24 21:48 UTCEG score recompute
  10. 2026-09-24 21:48 UTCGHSA enrichment
  11. 2026-09-24 10:24 UTCGHSA enrichment
  12. 2026-09-23 23:23 UTCEG score recompute
  13. 2026-09-23 23:23 UTCGHSA enrichment
  14. 2026-09-23 13:47 UTCEPSS rescore
  15. 2026-09-23 12:13 UTCGHSA enrichment
  16. 2026-09-23 01:13 UTCEG score recompute
  17. 2026-09-23 01:13 UTCGHSA enrichment
  18. 2026-09-22 14:12 UTCGHSA enrichment
  19. 2026-09-22 03:11 UTCEG score recompute
  20. 2026-09-22 03:11 UTCGHSA enrichment
  21. 2026-09-21 16:11 UTCGHSA enrichment
  22. 2026-09-21 05:06 UTCEG score recompute
  23. 2026-09-21 05:06 UTCGHSA enrichment
  24. 2026-09-20 20:15 UTCEPSS rescore
  25. 2026-09-20 18:05 UTCGHSA enrichment
  26. 2026-09-20 07:02 UTCGHSA enrichment
  27. 2026-09-19 19:58 UTCEG score recompute
  28. 2026-09-19 19:58 UTCGHSA enrichment
  29. 2026-09-19 08:58 UTCGHSA enrichment
  30. 2026-09-18 21:56 UTCEG score recompute
  31. 2026-09-18 21:56 UTCGHSA enrichment
  32. 2026-09-18 19:27 UTCEPSS rescore
  33. 2026-09-18 10:56 UTCGHSA enrichment
  34. 2026-09-17 23:55 UTCEG score recompute
  35. 2026-09-17 23:55 UTCGHSA enrichment
  36. 2026-09-17 11:53 UTCGHSA enrichment
  37. 2026-09-17 00:53 UTCEG score recompute
  38. 2026-09-17 00:53 UTCGHSA enrichment
  39. 2026-09-16 13:53 UTCEG score recompute
  40. 2026-09-16 13:53 UTCGHSA enrichment
  41. 2026-09-16 05:14 UTCEPSS rescore
  42. 2026-09-16 02:16 UTCGHSA enrichment
  43. 2026-09-15 15:16 UTCGHSA enrichment
  44. 2026-09-15 04:16 UTCEG score recompute
  45. 2026-09-15 04:16 UTCGHSA enrichment
  46. 2026-09-14 17:15 UTCGHSA enrichment
  47. 2026-09-14 06:14 UTCGHSA enrichment
  48. 2026-09-13 19:14 UTCEG score recompute
  49. 2026-09-13 19:14 UTCGHSA enrichment
  50. 2026-09-13 16:46 UTCEPSS rescore
  51. 2026-09-13 08:13 UTCGHSA enrichment
  52. 2026-09-12 21:13 UTCEG score recompute
  53. 2026-09-12 21:13 UTCGHSA enrichment
  54. 2026-09-12 15:00 UTCEPSS rescore
  55. 2026-09-12 10:13 UTCGHSA enrichment
  56. 2026-09-11 23:12 UTCEG score recompute
  57. 2026-09-11 23:12 UTCGHSA enrichment
  58. 2026-09-11 14:52 UTCEPSS rescore
  59. 2026-09-11 11:51 UTCEG score recompute
  60. 2026-09-11 11:51 UTCGHSA enrichment
  61. 2026-09-11 09:36 UTCEPSS rescore
  62. 2026-09-11 00:51 UTCGHSA enrichment
  63. 2026-09-10 13:51 UTCEG score recompute
  64. 2026-09-10 13:51 UTCGHSA enrichment
  65. 2026-09-10 09:34 UTCEPSS rescore
  66. 2026-09-10 02:50 UTCGHSA enrichment
  67. 2026-09-09 15:49 UTCGHSA enrichment
  68. 2026-09-09 13:35 UTCEG score recompute
  69. 2026-09-09 13:35 UTCGHSA enrichment
  70. 2026-09-09 13:05 UTCEG score recompute
  71. 2026-09-09 13:05 UTCGHSA enrichment
  72. 2026-09-09 09:18 UTCEG score recompute
  73. 2026-09-09 08:32 UTCEG score recompute
  74. 2026-09-09 08:30 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-12858?
CVE-2026-12858 is a high vulnerability published on September 9, 2026. Improper Privilege Management vulnerability in ESET AV Remover (standalone) allows Privilege Escalation via especially crafted RPC.
When was CVE-2026-12858 disclosed?
CVE-2026-12858 was first published on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12858 actively exploited?
CVE-2026-12858 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (below the 1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-12858?
CVE-2026-12858 has a CVSS base score of 8.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-12858?
No fix for CVE-2026-12858 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-12858 are linked in the Vendor Advisories panel on this page.

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