October 30, 2026

CVE Watchtower

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CVE-2025-5777NVD

Vulnerability Summary

Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
Severity Level
CRITICAL(9.3)
Published Date
Jun 17, 2025
Last Modified
Aug 14, 2025
PoC
Available(Nuclei)
Exploitation Status
ACTIVE
EPSS Score (30-Day)
Data Pending
Root Weakness (CWE)
CWE-125: Out-of-bounds Read ↗
The software reads data past the end, or before the beginning, of the intended buffer.
CWE-908: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CWE-457: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v4.0 Base Metrics — Score 9.3 (CRITICAL)
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredNone
User InteractionNone
Confidentiality (Vulnerable System)High
Integrity (Vulnerable System)High
Availability (Vulnerable System)High
Confidentiality (Subsequent System)Low
Integrity (Subsequent System)Low
Availability (Subsequent System)Low
CVSS v3.1 Base Metrics — Score 7.5 (HIGH)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone

Affected & Patched Versions

Affected Versions
  • Citrix Netscaler Application Delivery Controller >= 12.1 and < 12.1-55.328
  • Citrix Netscaler Application Delivery Controller >= 13.1 and < 13.1-37.235
  • Citrix Netscaler Application Delivery Controller >= 13.1 and < 13.1-58.32
  • Citrix Netscaler Application Delivery Controller >= 14.1 and < 14.1-43.56
  • Citrix Netscaler Gateway >= 13.1 and < 13.1-58.32
  • Citrix Netscaler Gateway >= 14.1 and < 14.1-43.56
Patched Versions
  • Citrix Netscaler Application Delivery Controller 12.1-55.328
  • Citrix Netscaler Application Delivery Controller 13.1-37.235
  • Citrix Netscaler Application Delivery Controller 13.1-58.32
  • Citrix Netscaler Application Delivery Controller 14.1-43.56
  • Citrix Netscaler Gateway 13.1-58.32
  • Citrix Netscaler Gateway 14.1-43.56
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🚫Ad-Free — Uninterrupted experience.
🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.

External References