---
title: "CVE-2025-7776: Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service"
url: https://erroneo.us/security/cve/CVE-2025-7776/
description: "CVE-2025-7776 (NetScaler ADC): Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service in NetScaler ADC and…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-08-26
date_modified: 2026-10-23
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-7776"
kev: false
cvss: 8.8
epss: 0.08213
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-7776: Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service

**Signal:** Normal patch cycle. No exploitation signal; fix it in your next routine update if you are affected. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 8.2% , percentile 95: FIRST’s model estimates a 8.2% chance of exploitation activity in the next 30 days, higher than 95% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Editorial verdict: Check exposure. NetScaler CVE-2025-7775: Exploited Pre-Auth Memory Overflow — Fixed since August 2025, but it was exploited before the patch to plant web shells; any appliance that ran an old build as a Gateway or AAA server back then needs a compromise check, and every NetScaler needs a far newer build today.

## What it is

Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) with PCoIP Profile bounded to it

## Affected products (CVE record)

- NetScaler ADC: 14.1 < 47.48, 13.1 < 59.22, 13.1 FIPS and NDcPP < 37.241, 12.1 FIPS and NDcPP < 55.330
- NetScaler Gateway: 14.1 < 47.48, 13.1 < 59.22, 13.1 FIPS and NDcPP < 37.241, 12.1 FIPS and NDcPP < 55.330

## Severity

- Citrix CVSS 4.0: 8.8 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:L`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact partial .
- FIRST EPSS (model of 2026-10-23): 8.21% probability of exploitation activity in the next 30 days; percentile 95.

## Sources

- [CVE.org record CVE-2025-7776](https://www.cve.org/CVERecord?id=CVE-2025-7776)
- [NVD entry CVE-2025-7776](https://nvd.nist.gov/vuln/detail/CVE-2025-7776)
- [support.citrix.com](https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694938)

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Source page: https://erroneo.us/security/cve/CVE-2025-7776/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt