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CVE-2026-88771

CRITICAL 9.5 KNOWN EXPLOITED PoC CATALOGUED

Published 2026-09-27 · Last modified 2026-09-29

Improper input validation vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to an unauthenticated attacker to execute arbitrary commands.

ACTIVELY EXPLOITED

Confirmed exploited in the wild — in CISA KEV since 2026-09-27. Patch or mitigate now.

Exploitation likelihood

82.2%chance of exploitation in 30 days · 100th percentile

● In CISA KEV (2026-09-27) ● Catalogued PoC

Impact if exploited

9.5CVSS 4.0 · CRITICAL

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable
  • ⚠Requirements: Specific conditions must be present

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

Public PoC or exploit resources are catalogued below.

Listed by the named source; Vulnpedia has not tested these resources.

PoC data: JSON

Resource commands

curl -s https://vulnpedia.com/cve/CVE-2026-88771/poc.jsonMachine-readable PoC index for this CVE (for automation).

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Citrix Netscaler Citrix

Products Adc Gateway Netscaler Application Delivery Controller Netscaler Gateway

Weakness (CWE)

  • CWE-20: Improper input validation

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

References and research data (JSON)

Unverified PoC candidates

Catalogue matches for further research. These repositories have not been validated as working exploits.

12 candidates

Additional exploitation reports

Source-specific reports, separate from CISA KEV. Repeated observations from one source are not independent confirmations.

1 more source reports

Known Affected Software Configurations

VendorProductVersion range
CitrixNetscaler Application Delivery Controller≥ 13.1 and < 13.1-64.23
CitrixNetscaler Application Delivery Controller≥ 13.1 and < 13.1.37.279
CitrixNetscaler Application Delivery Controller≥ 13.1 and < 13.1.37.279
CitrixNetscaler Application Delivery Controller≥ 14.1 and < 14.1-73.37
CitrixNetscaler Application Delivery Controller≥ 14.1-66.68 and ≤ 14.1-73.37
CitrixNetscaler Gateway≥ 13.1 and < 13.1-64.23
CitrixNetscaler Gateway≥ 14.1 and < 14.1-73.37

All CVSS metrics

  • CRITICAL 9.5 v4.0 · CNA Primary
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
  • CRITICAL 9.5 v4.0 · NVD Secondary
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
  • CRITICAL 9.8 v3.1 · NVD Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS