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

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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

84.47%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

Vendor Advisory1
Government Resource1

Related Vulnerabilities

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

CVESeverityCVSSEPSSExploitedFix
CVE-2014-0160High7.5100%KEVFix
CVE-2025-5777High7.5100%KEV + RansomFix
CVE-2021-4034High7.895%KEVFix
CVE-2020-8794Critical9.889%-Fix
CVE-2023-49285High8.689%-Fix
CVE-2023-21769High7.589%-Fix

Common questions

How do I fix CVE-2026-3055?

Published advisories record a fix for 2 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-3055 being actively exploited?

Yes. CVE-2026-3055 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. US federal agencies were required to remediate it by 2026-04-02. Treat it as a priority whatever its CVSS score says.

How severe is CVE-2026-3055?

CVE-2026-3055 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-3055 affect?

Published advisories record a fix for netscaler application delivery controller (NVD), netscaler gateway (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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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.