Is CVE-2026-28302 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-28302 being exploited in the wild.

How severe is CVE-2026-28302?

Critical severity, with a CVSS score of 9.1, published 21 July 2026.

Which products and versions are affected?

SolarWinds Serv-U 15.5.4 HF1 and below.

Is there a fix for CVE-2026-28302?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-28302 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-28302?

Check whether you run SolarWinds Serv-U at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-28302: SolarWinds Serv-U IDOR privilege escalation in group management

CVE-2026-28302 · Severity: critical · CVSS 9.1 · Published 2026-07-21

SolarWinds Serv-U, a managed file transfer and FTP server, is affected by a security flaw that allows an attacker to gain full control over the system. By exploiting an authorization bypass, a user with group administrator privileges can elevate their access to execute commands as the root user. This could lead to a complete compromise of the server, including the theft or deletion of sensitive files and disruption of business operations.

Technologies: SolarWinds Serv-U. Vendors: SolarWinds.

Quick answers

Is CVE-2026-28302 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-28302 being exploited in the wild.
How severe is CVE-2026-28302?: Critical severity, with a CVSS score of 9.1, published 21 July 2026.
Which products and versions are affected?: SolarWinds Serv-U 15.5.4 HF1 and below.
Is there a fix for CVE-2026-28302?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-28302 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-28302?: Check whether you run SolarWinds Serv-U at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

SolarWinds Serv-U (version 15.5.4 HF1 and below) contains an Insecure Direct Object Reference (IDOR) vulnerability, classified as CWE-639. The flaw allows an attacker with existing group administrator privileges to bypass authorization checks by manipulating user-controlled keys. Successful exploitation enables the attacker to escalate privileges and achieve remote code execution with root/system-level authority. While the vulnerability is network-reachable, it requires high privileges (PR:H) to execute. The impact is noted to be lower on Windows deployments compared to Linux. SolarWinds has addressed this in version 2026.3.

Affected products

SolarWinds Serv-U 15.5.4 HF1 and below

Timeline

2026-07-21: disclosed
2026-07-21: advisory

References

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