Is CVE-2026-33026 in the CISA KEV catalog?

No. CVE-2026-33026 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-33026?

CVE-2026-33026 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2026-33026?

CVE-2026-33026 has an EPSS score of 0.33% (25th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-33026?

Upgrade nginx ui to 2.3.4 or later.

CVE & CISA-KEV Catalog

CVE-2026-33026

CRITICAL

9.1

CVSS v3

NVD

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.

CWE-312 CWE-347 CWE-354

How to fix

Remediation Available

nginx uiNVD

Affected:< 2.3.4Fixed in:2.3.4CVE-2026-33026derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Exploit Intelligence

0.33%probability of exploitation in 30 days

25thpercentile

Low risk: more likely to be exploited than 25% of all known CVEs.

References

Exploit1

github.com

Release Notes1

github.com

Related Vulnerabilities

Other CWE-312 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-50719	High	7.5	84%	-	Fix
CVE-2022-26148	Critical	9.8	53%	-	Fix
CVE-2020-24577	High	7.5	19%	-	Fix
CVE-2021-27140	High	7.5	19%	-	-
CVE-2021-27176	High	7.5	19%	-	-
CVE-2021-27174	High	7.5	19%	-	-

Embed a live status badge for CVE-2026-33026

Markdown

[![CVE-2026-33026](https://tridentstack.com/cve/badge/CVE-2026-33026.svg)](https://tridentstack.com/cve/CVE-2026-33026)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-33026"><img src="https://tridentstack.com/cve/badge/CVE-2026-33026.svg" alt="CVE-2026-33026"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-01.