CVE-2026-28307

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-21. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

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

SolarWinds Serv-U is affected by a privilege escalation vulnerability that allows a domain user group to be elevated into an administrator group. The impact is lower in Windows deployments.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity91% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
41%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 24, 2026

Advisory Details (2)

Auto-updated Sep 7, 2026
No patch confirmed yet.
generic

SolarWinds Trust Center Security Advisories | CVE-2026-28307

https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28307
generic

Serv-U 2026.3 release notes

https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_2026-3_release_notes.htm

Vendor Advisories for CVE-2026-28307(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 / 151× 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.

Showing the most recent 100 of 344 total refreshes for this CVE.

  1. 2026-09-14 10:19 UTCGHSA enrichment
  2. 2026-09-14 06:18 UTCGHSA enrichment
  3. 2026-09-14 02:29 UTCGHSA enrichment
  4. 2026-09-13 22:40 UTCEG score recompute
  5. 2026-09-13 22:40 UTCGHSA enrichment
  6. 2026-09-13 16:47 UTCEPSS rescore
  7. 2026-09-13 15:57 UTCGHSA enrichment
  8. 2026-09-13 11:26 UTCGHSA enrichment
  9. 2026-09-13 07:01 UTCGHSA enrichment
  10. 2026-09-13 02:58 UTCGHSA enrichment
  11. 2026-09-12 19:03 UTCEG score recompute
  12. 2026-09-12 19:03 UTCGHSA enrichment
  13. 2026-09-12 15:01 UTCEPSS rescore
  14. 2026-09-12 13:36 UTCGHSA enrichment
  15. 2026-09-12 09:47 UTCGHSA enrichment
  16. 2026-09-12 05:47 UTCGHSA enrichment
  17. 2026-09-12 01:56 UTCGHSA enrichment
  18. 2026-09-11 22:07 UTCGHSA enrichment
  19. 2026-09-11 18:17 UTCEG score recompute
  20. 2026-09-11 18:17 UTCGHSA enrichment
  21. 2026-09-11 14:52 UTCEPSS rescore
  22. 2026-09-11 09:04 UTCEG score recompute
  23. 2026-09-11 09:04 UTCGHSA enrichment
  24. 2026-09-10 09:34 UTCEPSS rescore
  25. 2026-09-09 11:32 UTCEG score recompute
Show 75 more
  1. 2026-09-09 11:32 UTCGHSA enrichment
  2. 2026-09-08 22:00 UTCEPSS rescore
  3. 2026-09-08 02:27 UTCGHSA enrichment
  4. 2026-09-07 22:38 UTCEG score recompute
  5. 2026-09-07 22:38 UTCGHSA enrichment
  6. 2026-09-07 16:01 UTCEPSS rescore
  7. 2026-09-06 18:48 UTCGHSA enrichment
  8. 2026-09-06 14:48 UTCEG score recompute
  9. 2026-09-06 14:48 UTCGHSA enrichment
  10. 2026-09-06 13:47 UTCEPSS rescore
  11. 2026-09-06 13:47 UTCEPSS rescore
  12. 2026-09-06 10:59 UTCGHSA enrichment
  13. 2026-09-06 04:02 UTCGHSA enrichment
  14. 2026-09-05 23:39 UTCGHSA enrichment
  15. 2026-09-05 19:51 UTCEG score recompute
  16. 2026-09-05 19:51 UTCGHSA enrichment
  17. 2026-09-05 08:56 UTCEG score recompute
  18. 2026-09-05 08:56 UTCGHSA enrichment
  19. 2026-09-04 05:06 UTCEPSS rescore
  20. 2026-09-02 14:11 UTCEPSS rescore
  21. 2026-09-02 00:58 UTCEG score recompute
  22. 2026-09-02 00:58 UTCGHSA enrichment
  23. 2026-09-01 13:53 UTCEPSS rescore
  24. 2026-09-01 04:39 UTCEPSS rescore
  25. 2026-09-01 04:39 UTCEPSS rescore
  26. 2026-08-31 06:51 UTCGHSA enrichment
  27. 2026-08-31 02:48 UTCGHSA enrichment
  28. 2026-08-30 22:59 UTCEG score recompute
  29. 2026-08-30 22:59 UTCGHSA enrichment
  30. 2026-08-30 19:17 UTCEPSS rescore
  31. 2026-08-30 19:10 UTCGHSA enrichment
  32. 2026-08-30 15:21 UTCGHSA enrichment
  33. 2026-08-30 10:55 UTCGHSA enrichment
  34. 2026-08-30 06:11 UTCGHSA enrichment
  35. 2026-08-30 02:18 UTCEG score recompute
  36. 2026-08-30 02:18 UTCGHSA enrichment
  37. 2026-08-30 01:22 UTCEPSS rescore
  38. 2026-08-28 21:41 UTCEPSS rescore
  39. 2026-08-28 01:39 UTCGHSA enrichment
  40. 2026-08-27 21:18 UTCGHSA enrichment
  41. 2026-08-27 15:12 UTCEG score recompute
  42. 2026-08-27 15:12 UTCGHSA enrichment
  43. 2026-08-27 14:25 UTCEPSS rescore
  44. 2026-08-27 11:21 UTCGHSA enrichment
  45. 2026-08-27 05:08 UTCGHSA enrichment
  46. 2026-08-27 01:19 UTCGHSA enrichment
  47. 2026-08-26 21:29 UTCGHSA enrichment
  48. 2026-08-26 15:30 UTCEG score recompute
  49. 2026-08-26 15:30 UTCGHSA enrichment
  50. 2026-08-26 14:46 UTCEPSS rescore
  51. 2026-08-26 11:38 UTCGHSA enrichment
  52. 2026-08-26 07:15 UTCGHSA enrichment
  53. 2026-08-26 02:25 UTCGHSA enrichment
  54. 2026-08-25 22:37 UTCGHSA enrichment
  55. 2026-08-25 18:23 UTCGHSA enrichment
  56. 2026-08-25 14:35 UTCEG score recompute
  57. 2026-08-25 14:35 UTCGHSA enrichment
  58. 2026-08-25 13:49 UTCEPSS rescore
  59. 2026-08-25 10:45 UTCGHSA enrichment
  60. 2026-08-25 06:44 UTCGHSA enrichment
  61. 2026-08-25 02:46 UTCGHSA enrichment
  62. 2026-08-24 22:57 UTCGHSA enrichment
  63. 2026-08-24 19:09 UTCGHSA enrichment
  64. 2026-08-24 15:20 UTCEG score recompute
  65. 2026-08-24 15:20 UTCGHSA enrichment
  66. 2026-08-24 14:17 UTCEPSS rescore
  67. 2026-08-24 11:30 UTCEG score recompute
  68. 2026-08-24 11:30 UTCGHSA enrichment
  69. 2026-08-24 07:41 UTCGHSA enrichment
  70. 2026-08-24 03:41 UTCGHSA enrichment
  71. 2026-08-23 23:27 UTCGHSA enrichment
  72. 2026-08-23 19:39 UTCGHSA enrichment
  73. 2026-08-23 15:50 UTCGHSA enrichment
  74. 2026-08-23 12:02 UTCGHSA enrichment
  75. 2026-08-23 08:12 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-28307?
CVE-2026-28307 is a critical vulnerability published on July 21, 2026. SolarWinds Serv-U is affected by a privilege escalation vulnerability that allows a domain user group to be elevated into an administrator group. The impact is lower in Windows deployments.
When was CVE-2026-28307 disclosed?
CVE-2026-28307 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-28307 actively exploited?
CVE-2026-28307 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 59.0% of all scored CVEs.
What is the CVSS score of CVE-2026-28307?
CVE-2026-28307 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-28307?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-28307, 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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