# CVE-2026-88778

Predictable token values in Citrix NetScaler ADC/Gateway enabling token/session prediction.

- Page: https://www.vulneraibility.com/cve/CVE-2026-88778
- CVSS: 8.8
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 0.69% (percentile 53.4)
- Unvetted proof-of-concept code on GitHub: 1 GitHub proof of concept (first 2026-10-23)
- CISA SSVC: exploitation none, automatable yes, technical impact total (assessed 2026-09-29)
- Weakness: CWE-342
- 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

Attackers can predict authentication/session values to impersonate users, bypass auth, and gain unauthorized access to applications.

## Action

Immediate action required

## Recommendation

Apply vendor updates to fixed versions, rotate credentials, and monitor session/auth logs.

## References

- [other] https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096

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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.