Widely deployed enterprise infrastructure; DoS could disrupt services across many orgs.
CVE-2026-8452
Memory overflow in Citrix NetScaler ADC/Gateway causes DoS on Gateway/AAA servers.
Is CVE-2026-8452 being exploited?
Yes. CVE-2026-8452 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2026-8452?
CVE-2026-8452 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-8452?
Yes. A fix has been recorded for CVE-2026-8452. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-8452 affect?
CVE-2026-8452 affects Citrix NetScaler ADC, Citrix NetScaler Gateway. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-8452?
Monitor advisories; patch when released
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Denial of service via memory overflow on Gateway/AAA virtual servers; appliance crash/unavailability.
Monitor only
- affected>= 14.1 and < 72.61
- affected>= 13.1 and < 63.18
- affected>= 14.1 FIPS and < 72.61
- affected>= 13.1 FIPS and NDcPP and < 37.272
- affected>= 14.1 and < 72.61
- affected>= 13.1 and < 63.18
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.