CVE-2026-8452Public exploitNetwork attack vector

Unauthenticated service interruption via memory overflow

Published Jun 30, 2026 · Updated Jun 30, 2026

Memory overflow in Citrix NetScaler ADC and NetScaler Gateway allows remote attackers to interrupt service through network requests. Citrix has not identified the affected parser or overflowing operation; independent research links a SAML SignedInfo canonicalization overflow to this CVE but expressly labels the attribution unconfirmed. Exposure requires a Gateway or AAA virtual server, and triggering the flaw can cause erroneous behavior or an appliance outage.

CVSS severity9.8
Critical
EPSS probability1.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Memory overflow in Citrix NetScaler ADC and NetScaler Gateway allows remote attackers to interrupt service through network requests. Citrix has not identified the affected parser or overflowing operation; independent research links a SAML SignedInfo canonicalization overflow to this CVE but expressly labels the attribution unconfirmed. Exposure requires a Gateway or AAA virtual server, and triggering the flaw can cause erroneous behavior or an appliance outage.

The record

CVE
CVE-2026-8452
Published
Jun 30, 2026
Updated
Jun 30, 2026
Vendor
Cloud Software Group
Product
NetScaler Gateway
Classifications
CWE-119, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=13.1 <63.18
  2. Affected versionversion=14.1 <72.61

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cloud Software Group · NetScaler Gatewayversion=13.1 <63.18; version=14.1 <72.61
Cloud Software Group · NetScaler ADCversion=13.1 <63.18; version=13.1 FIPS and NDcPP <37.272; version=14.1 <72.61; version=14.1 FIPS <72.61

Published CVSS scores

8.8NetScalerCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:L/SI:L/SA:L
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo