CVE-2026-28308

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: 1%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 an insecure direct object reference (IDOR) vulnerability that can lead to remote code execution. Domain administrator access is required. 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
1%
EPSS %ILE
54%
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-2026-28308

https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28308
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-2026-28308(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 24× in last 7d / 152× 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 301 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-28308?
CVE-2026-28308 is a critical vulnerability published on July 21, 2026. SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to remote code execution. Domain administrator access is required. The impact is lower in Windows deployments.
When was CVE-2026-28308 disclosed?
CVE-2026-28308 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-2026-28308 actively exploited?
CVE-2026-28308 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 46.0% of all scored CVEs.
What is the CVSS score of CVE-2026-28308?
CVE-2026-28308 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-28308?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-28308, 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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