Vulnerability details
CVE-2026-88772
Actively exploited
Citrix NetScaler ADCCitrix NetScaler Gateway
Memory overflow vulnerability leading to Remote Code Execution or Denial of Service
CVSS 4.0
9.5Critical
Official description
Vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to Remote Code Execution or Denial of Service
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.5Critical | 4.0 | CVEProject cvelistV5 (CNA) (NetScaler) | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Citrix NetScaler | ADC | v < 14.1-73.37 | CVEProject cvelistV5 (CNA) |
| Citrix NetScaler | ADC | v < 13.1-64.23 | CVEProject cvelistV5 (CNA) |
| Citrix NetScaler | ADC | v < 14.1-73.37 FIPS | CVEProject cvelistV5 (CNA) |
| Citrix NetScaler | ADC | v < 13.1.37.279 FIPS and NDcPP | CVEProject cvelistV5 (CNA) |
| Citrix NetScaler | Gateway | v < 14.1-73.37 | CVEProject cvelistV5 (CNA) |
| Citrix NetScaler | Gateway | v < 13.1-64.23 | CVEProject cvelistV5 (CNA) |
References and advisories
2- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096&articleTitle=Citrix_NetScaler_ADC_and_Citrix_NetScaler_Gateway_Security_Bulletin_for_CVE_2026_88771_CVE_2026_88772_CVE_2026_88773_CVE_2026_88774_CVE_2026_88775_CVE_2026_88776_CVE_2026_88777_and_CVE_2026_88778
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-88772 government-resource
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Details
- Published
- 2026-09-27
- Last updated
- 2026-09-28
- State
- Published
- Assigner (CNA)
- NetScaler
- Kolun priority
- 79 · High
CISA KEV catalog
- Date added
- 2026-09-27
- Due date
- 2026-09-30
- Used in ransomware
- Unknown
Exploit prediction (EPSS)
76.56%
Probability of exploitation in 30 days
99.5%
Percentile (among all CVEs)
- 2026-11-0576.56%
- 2026-11-0378.16%
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Active
- Technical impact
- Total
Weaknesses (CWE)
- CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer