Citrix patches 28 NetScaler flaws, one critical on default installs
CVE-2026-120868, a CVSS 9.3 memory overflow, needs no login or special feature and can crash any unpatched appliance.
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CVE-2026-120861
Memory overflow DoS in Citrix NetScaler GSLB
- CVSS 4.0
- 8.7 high
- EPSS
- —
- Published
- ·
- Modified
AI analysisSummaries by Vani AI
Improper memory handling in Citrix NetScaler GSLB and geolocation (MEP, static proximity, and config sync) can cause unpredictable or erroneous behavior or a denial of service. A remote attacker can trigger it over the network with no authentication or user interaction. Impact is mainly loss of availability on the appliance, with limited effects on connected systems. NetScaler deployments that use these GSLB features are affected.
What to do: Apply Citrix's update for CVE-2026-120861. No workaround is stated.
| Product | Affected |
|---|---|
| Citrix NetScaler | — |
Estimated exposure
No basis for an estimate.
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Description · NVD
Memory overflow / improper handling in GSLB and geolocation (MEP, static-proximity, config-sync) can lead to unpredictable or erroneous behavior or Denial of Service in Citrix NetScaler
- Vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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