# CVE-2026-88779 — NetScaler ADC

**CISA KEV**

> As of 2026-10-05, CVE-2026-88779 is a High-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in NetScaler ADC, CVSS v4.0 8.7, EPSS 0.2% (18.2th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-10-04), with a US federal remediation deadline of 2026-10-07. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-88779, most recently “CISA adds Citrix NetScaler SAML memory overflow DoS (CVE-2026-88779) to KEV Catalog”.

**Last updated:** 2026-10-05

## What is CVE-2026-88779?

Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: before 14.1-73.41, before 13.1-64.28, before 14.1-73.41 FIPS, and before 13.1-37.282; Gateway: before 14.1-73.41 and before 13.1-64.28.

The record classifies CVE-2026-88779 under weakness class [CWE-119](https://intel.threadlinqs.com/cwe/CWE-119). 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 1 day ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 8.7 — High (derived from score) (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 18.2% of all scored CVEs
- **CISA KEV:** Listed since 2026-10-04, federal remediation deadline 2026-10-07
- **Threadlinqs priority:** 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- **Published:** 2026-10-04, last modified 2026-10-05

## Is CVE-2026-88779 being exploited?

CISA added CVE-2026-88779 to the Known Exploited Vulnerabilities catalog on 2026-10-04, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-10-07 under BOD 22-01. It currently carries a trending score of 44 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [NetScaler](https://intel.threadlinqs.com/vendors/netscaler): ADC, Gateway

## How to fix CVE-2026-88779

Because CVE-2026-88779 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-10-07. No vendor patch reference has been recorded for CVE-2026-88779 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-88779

1 tracked threat in the Threadlinqs corpus references CVE-2026-88779, either in the campaign’s CVE list or as an indicator on the campaign record.

- [CISA adds Citrix NetScaler SAML memory overflow DoS (CVE-2026-88779) to KEV Catalog](https://intel.threadlinqs.com/threat/TL-2026-2896) — HIGH · 2026-10-04

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV. Last verified by Threadlinqs on 2026-10-05. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [support.citrix.com](https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697174)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-88779
Full detection coverage and IOCs for threats exploiting CVE-2026-88779 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp