Is CVE-2026-3055 in the CISA KEV catalog?

Yes. CVE-2026-3055 is on the CISA Known Exploited Vulnerabilities list, added 2026-03-30.

What is the CVSS severity of CVE-2026-3055?

CVE-2026-3055 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2026-3055?

CVE-2026-3055 has an EPSS score of 84.00% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-3055?

Upgrade netscaler application delivery controller to 13.1-37.262 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2026-3055

CRITICALCISA KEVEPSS 100th pctl

9.8

CVSS v3

NVD

Description

Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread

CWE-125Out-of-bounds Read

How to fix

Remediation Available

netscaler application delivery controllerNVD

Affected:>= 13.1, < 13.1-37.262Fixed in:13.1-37.262CVE-2026-3055derived from NVD

Affected:>= 14.1, < 14.1-60.58Fixed in:14.1-60.58CVE-2026-3055derived from NVD

netscaler gatewayNVD

Affected:>= 14.1, < 14.1-60.58Fixed in:14.1-60.58CVE-2026-3055derived 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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

84.00%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Remediation due: 2026-04-02

References

Exploit1

labs.watchtowr.com

Vendor Advisory1

support.citrix.com

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix

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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 2026-03-31.