CyberSecBulletin
CVE-2025-8424NVD status: Deferred

ADC: Improper Validation of Specified Quantity in Input

Published Updated By the CyberSecBulletin desk

CVE-2025-8424 is a high-severity improper validation of specified quantity in input vulnerability in ADC from NetScaler, with a CVSS 4.0 base score of 8.7 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. The record lists versions 47.48, 59.22, 37.241 as the first without the flaw, so updating ADC to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 3.73% chance of exploitation within 30 days, higher than 90% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update ADC to 47.48 or 59.22 or 37.241 or 55.330, whichever matches your release line, or a later version.
  2. Update Gateway to 47.48 or 59.22 or 37.241 or 55.330, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
NetScalerADC14.1 up to, but not including, 47.48; 13.1 up to, but not including, 59.22; 13.1 FIPS and NDcPP up to, but not including, 37.241; 12.1 FIPS and NDcPP up to, but not including, 55.33047.48, 59.22, 37.241, 55.330
NetScalerGateway14.1 up to, but not including, 47.48; 13.1 up to, but not including, 59.22; 13.1 FIPS and NDcPP up to, but not including, 37.241; 12.1 FIPS and NDcPP up to, but not including, 55.33047.48, 59.22, 37.241, 55.330

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
AdjacentThe attacker must be on the same local network segment.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Attack requirements
NoneThe attack does not depend on a particular deployment or configuration.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Confidentiality (vulnerable system)
HighSerious loss of confidentiality on the vulnerable system.
Integrity (vulnerable system)
HighSerious loss of integrity on the vulnerable system.
Availability (vulnerable system)
HighSerious loss of availability on the vulnerable system.
Confidentiality (other systems)
LowLimited loss of confidentiality on systems beyond the vulnerable one.
Integrity (other systems)
LowLimited loss of integrity on systems beyond the vulnerable one.
Availability (other systems)
LowLimited loss of availability on systems beyond the vulnerable one.

Vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. Scored by CNA (citrix.com).

Official description

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

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Validation of Specified Quantity in Input

The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.

More Improper Validation of Specified Quantity in Input vulnerabilities (CWE-1284)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in ADC

All ADC vulnerabilities

Recent Improper Validation of Specified Quantity in Input vulnerabilities

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