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CVE-2026-33026

Nginxui Nginx UI vulnerability

9.1 CRITICALPublic exploitEPSS 0.21%
  1. Published30 Mar 2026

Description

Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui backup restore mechanism allows attackers to tamper with encrypted backup archives and inject malicious configuration during restoration. This issue has been patched in version 2.3.4.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

Nginxui Nginx UI< 2.3.4

Remediation

Fixed in
Nginxui Nginx UI≥ 2.3.4

References

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Frequently asked

Is CVE-2026-33026 being actively exploited?

CVE-2026-33026 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.21%.

How severe is CVE-2026-33026?

CVE-2026-33026 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.21% probability of exploitation.

Which products are affected by CVE-2026-33026?

Affected products include Nginxui Nginx UI.

How do I fix CVE-2026-33026?

Upgrade affected software to a fixed version, for example Nginxui Nginx UI 2.3.4 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-33026 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.