CVE-2026-88778: netscaler gateway — Fix

Description

Predictable exact value from previous values 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.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploit Prediction

0.0069

Probability of exploitation

0.53%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-342 CWE-342

Affected Products

Vendor	Product	Versions
citrix	netscaler_application_delivery_controller	13.1 — 13.1-64.23
citrix	netscaler_application_delivery_controller	13.1 — 13.1.37.279
citrix	netscaler_application_delivery_controller	13.1 — 13.1.37.279
citrix	netscaler_application_delivery_controller	14.1 — 14.1-73.37
citrix	netscaler_application_delivery_controller	14.1-66.68 — 14.1-73.37
citrix	netscaler_gateway	13.1 — 13.1-64.23
citrix	netscaler_gateway	14.1 — 14.1-73.37

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2026-88778? +

Predictable exact value from previous values 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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-88778? +

CVE-2026-88778 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0069, placing it in the 1th percentile for exploitation probability.

What products are affected by CVE-2026-88778? +

CVE-2026-88778 affects products from citrix, specifically: netscaler_application_delivery_controller, netscaler_gateway. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-88778? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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