Citrix — Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
CISA KEV · in the CISA KEV catalog since 2026-09-27
Listed in the CISA KEV catalog, and an EPSS probability of 0.013.
Patch This Cycle
The priority band answers “how soon”, not “how bad” — see Methodology for what it weighs and where it abstains.
| Measure | Value | Source | What it means |
|---|---|---|---|
| CVSS base score | 9.5 | NVD | How severe the flaw is in itself. It does not say how likely an attack is. |
| FIRST EPSS | 0.013 (70th pctl) | FIRST | FIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. |
| Actively exploited | Confirmed | CISA KEV | Whether a source of record has confirmed attacks using it in the wild. |
| Ransomware campaign use | Unknown or none | CISA KEV | Whether CISA has seen ransomware operators use it. |
| CISA remediation deadline | 2026-09-30 — CISA federal deadline · Overdue by 17 days | CISA KEV | The date US federal agencies must have fixed or mitigated it. |
1.30% as of 2026-10-15 (69.9th percentile). FIRST EPSS, recorded daily since this page started tracking it.
This page is an opinion about urgency. Where it and a source of record disagree, the source of record is the record.
Where this sits
CVE-2026-88772 is one of the entries ranked on the priority feed and in the non-Microsoft advisories.
