Security Digest · Vulnerability record
CVE-2025-8424: Improper access control on the NetScaler Management Interface
Improper access control on the NetScaler Management Interface in NetScaler ADC and NetScaler Gateway when an attacker can get access to the appliance NSIP, Cluster Management IP or local GSLB Site IP or SNIP with Management Access
CVSS 8.7 High EPSS 3.3% · p89 Check exposure
Should you act?
Normal patch cycle
No exploitation signal; fix it in your next routine update if you are affected. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- 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 3.3%, percentile 89: FIRST’s model estimates a 3.3% chance of exploitation activity in the next 30 days, higher than 89% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- 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
Improper access control on the NetScaler Management Interface in NetScaler ADC and NetScaler Gateway when an attacker can get access to the appliance NSIP, Cluster Management IP or local GSLB Site IP or SNIP with Management Access
Weakness type: CWE-1284.
Product: NetScaler ADC · Assigned by: Citrix · Published: 2025-08-26
Affected and fixed versions
| Vendor | Product | Affected versions (per 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 scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| Citrix | 4.0 | 8.7 High | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L |
- Attack vector: adjacent network only
- Attack complexity: low
- Attack requirements: none
- Privileges required: none (no login)
- User interaction: none
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none, automatable no, technical impact total.
- FIRST EPSS (model of 2026-10-23): 3.34% probability of exploitation activity in the next 30 days; percentile 89.
Timeline
- — CVE record published by Citrix
- — erroneo.us brief: NetScaler CVE-2025-7775: Exploited Pre-Auth Memory Overflow
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- CVE.org record CVE-2025-8424 cve.org
- NVD entry CVE-2025-8424 nvd.nist.gov
Other references from the CVE record and advisory
- support.citrix.com support.citrix.com