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01 Record

CVE-2026-28316

SolarWinds Serv-U Insecure Direct Object Reference (IDOR) Vulnerability

CriticalPUBLISHEDCNA: SolarWinds
CNA base score9.1 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

02 Description

SolarWinds Serv-U Insecure Direct Object Reference (IDOR) Vulnerability

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
2.13% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 81.6% of scored records. A rank, not a probability.
NVD base score
9.1 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
NVD analysis status
Analyzed. NVD last modified this record on 2026-10-24.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-07-21 15:39Z3 MO AGO
Last updated
2026-07-24 03:55Z3 MO AGO
Reserved
2026-02-26
Assigning CNA
SolarWinds
Record state
PUBLISHED
Severity
Critical (CVSS 9.1)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Weaknesses
  • CWE-639Authorization Bypass Through User-Controlled KeyBase
Data version
5.2
Document digest
e82f8275d41597468df17311ba99e0f20d2d058c3d4fc4963fc3eb693ce6a1da

05 Affected products

VendorProductVersionsPlatforms
SolarWindsServ-U15.5.4 HF1 and belowWindows, Linux

06 References

07 Remediation

SolarWinds recommends customers upgrade to Serv-U version 2026.3 as soon as is practical.