# CVE-2026-10816 — NetScaler ADC

> As of 2026-06-30, CVE-2026-10816 is a HIGH-severity vulnerability in NetScaler ADC, CVSS v3.1 7.5, EPSS 0.2% (12.7th percentile). Threadlinqs Intelligence links 3 tracked threat campaigns to CVE-2026-10816, most recently “CitrixBleed-Class NetScaler ADC/Gateway SAML AuthnRequest Memory Disclosure (CVE-2026-8451) Exploited Within 24 Hours of Disclosure”.

**Last updated:** 2026-06-30

## What is CVE-2026-10816?

Arbitrary File Read (Unauthenticated) in NetScaler ADC and NetScaler Gateway if the access to NSIP, Cluster Management IP or SNIP with management access is enabled

The record classifies CVE-2026-10816 under weakness class [CWE-73](https://cwe.mitre.org/data/definitions/73.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 75 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.5 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **CVSS v4.0 base score:** 7.1 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 12.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.3/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-06-30

## Is CVE-2026-10816 being exploited?

No public exploitation evidence for CVE-2026-10816 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-06-30. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- **NetScaler**: ADC, Gateway

## How to fix CVE-2026-10816

Vendor advisory: [https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604](https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604). Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

## Threat activity tracking CVE-2026-10816

3 tracked threats in the Threadlinqs corpus reference CVE-2026-10816, either in the campaign’s CVE list or as an indicator on the campaign record.

- [CitrixBleed-Class NetScaler ADC/Gateway SAML AuthnRequest Memory Disclosure (CVE-2026-8451) Exploited Within 24 Hours of Disclosure](https://intel.threadlinqs.com/threat/TL-2026-1078) — CRITICAL · 2026-07-02
- [CVE-2026-8451: Memory Overread in Citrix NetScaler ADC/Gateway SAML IdP ('CitrixBleed'-class, CVSS 8.8) — Exploited Within 24 Hours of Disclosure](https://intel.threadlinqs.com/threat/TL-2026-1092) — HIGH · 2026-07-02
- [CitrixBleed 2.0: CVE-2026-8451 NetScaler SAML IDP Memory Overread Under Active Exploitation](https://intel.threadlinqs.com/threat/TL-2026-1140) — CRITICAL · 2026-06-30

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-07-02. 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=CTX696604)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-10816
Full detection coverage and IOCs for threats exploiting CVE-2026-10816 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp