# CVE-2026-88775

Remote memory overflow in Citrix NetScaler causing DoS

- Page: https://www.vulneraibility.com/cve/CVE-2026-88775
- CVSS: 8.8
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 0.72% (percentile 54.3)
- Unvetted proof-of-concept code on GitHub: 1 GitHub proof of concept (first 2026-10-23)
- CISA SSVC: exploitation none, automatable yes, technical impact partial (assessed 2026-09-29)
- Weakness: CWE-120
- Published: 2026-09-27

## Affected versions

- Citrix NetScaler ADC: affected < 14.1-73.37; < 13.1-64.23; < 14.1-73.37 FIPS; < 13.1.37.279 FIPS and NDcPP
- Citrix NetScaler Gateway: affected < 14.1-73.37; < 13.1-64.23

A version outside these ranges is not a statement that it is unaffected.

## Impact

Remote memory overflow allows attackers to trigger unpredictable behavior or deny service of NetScaler ADC/Gateway appliances.

## Action

Immediate action required

## Recommendation

Upgrade to fixed versions (>=14.1-73.37 or >=13.1-64.23) or apply vendor mitigations.

## References

- [other] 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

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.