Unrated

Memory Overread in Citrix NetScaler ADC and NetScaler Gateway TCP TimeStamp Handling

IdentifiersCVE-2026-10817CWE-125

CVE-2026-10817 is an insufficient input validation vulnerability in Citrix NetScaler ADC and NetScaler Gateway that can lead to a memory overread. According to the provided advisory content, the issue is triggered when TCP TimeStamp is enabled in a TCP Profile and that profile is associated with a NetScaler virtual server of type LB, CS, or VPN, or with a configured service. The vulnerability is classified as CWE-125 (Out-of-bounds Read). No specific vulnerable function or code path is identified in the provided material.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can cause an out-of-bounds memory read on affected NetScaler appliances operating under the specified TCP TimeStamp configuration conditions. The provided content does not state arbitrary code execution or privilege escalation; the documented impact is limited to memory overread, which may expose unintended process memory contents and could affect confidentiality depending on what data is read.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, disable TCP TimeStamp in the relevant TCP Profile or remove the affected TCP Profile association from impacted virtual servers or services, where operationally feasible. Review NetScaler configurations to identify LB, CS, VPN virtual servers and services using TCP profiles with TCP TimeStamp enabled.

Remediation

Patch, then assume compromise.

Upgrade affected systems to Citrix-fixed versions: NetScaler ADC and NetScaler Gateway 14.1-72.61 or later; NetScaler ADC and NetScaler Gateway 13.1-63.18 or later in the 13.1 branch; NetScaler ADC 14.1-FIPS 14.1-72.61 FIPS or later; NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1-37.272 or later.

PUBLIC EXPLOITS

Exploits

No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.

VALID 0 / 1 TOTALView more in app

All candidate exploits were filtered out by Mallory's validation.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

Citrix SystemsNetscaler Adcapplication

Citrix SystemsNetscaler Gatewayapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

7 SOURCESView more in app

cyber security newsNews

Jul 1, 2026

Multiple Citrix NetScaler ADC and Gateway Vulnerabilities Enables DoS and Memory Overflow Attacks

A high-severity vulnerability in Citrix NetScaler ADC and NetScaler Gateway related to improper memory handling and insufficient input validation that can be exploited to cause denial-of-service or memory overflow conditions.

the hacker newsNews

Jul 1, 2026

Citrix Patches Six NetScaler Flaws Allowing File Read and Denial-of-Service

An insufficient input validation vulnerability in Citrix NetScaler that can cause memory overread when TCP TimeStamp is enabled in the relevant TCP profile.

malware newsNews

Jun 30, 2026

Citrix security advisory (AV26-645) - Malware News - Malware Analysis, News and Indicators

A critical vulnerability addressed by Citrix in NetScaler ADC, NetScaler Gateway, and related FIPS/NDcPP editions.

ca ccsNews

Jun 30, 2026

Citrix security advisory (AV26-645) - Canadian Centre for Cyber Security

A critical vulnerability addressed by Citrix in NetScaler ADC and NetScaler Gateway products.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity2

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2026-10817

NVD

nvd.nist.gov/vuln/detail/CVE-2026-10817

MITRE CWE · CWE-125

cwe.mitre.org