EUVD-2026-87972
GHSA-wm5f-p8pr-c4v4
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/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
Unauthenticated network memory overflow with low complexity (AV:N/AC:L/PR:N/UI:N); dominant availability impact (A:H) from DoS with only minor confidentiality/integrity effect (C:L/I:L), no scope change.
Primary rating from Vendor (NetScaler).
CVSS VectorVendor: NetScaler
Lifecycle Timeline
3DescriptionCVE.org
Memory overflow vulnerability 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 unpredictable or erroneous behavior or Denial of Service
AnalysisAI
Remote unauthenticated attackers can trigger a memory overflow in Citrix NetScaler ADC and Gateway, leading to unpredictable behavior or denial of service. Affected versions include ADC before 14.1-73.37 and 13.1-64.23 (plus FIPS/NDcPP builds before 14.1-73.37 and 13.1.37.279), and Gateway before 14.1-73.37 and 13.1-64.23. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions - remote unauthenticated exploitation over the network against NetScaler ADC/Gateway (AV:N/AC:L/PR:N/UI:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H, base 8.8) describes an unauthenticated, network-reachable, low-complexity flaw whose dominant impact is availability (VA:H) with only low confidentiality/integrity effect - consistent with the description's 'unpredictable or erroneous behavior or Denial of Service' outcome. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patches are available: upgrade ADC to 14.1-73.37 or later, ADC to 13.1-64.23 or later, ADC FIPS to 14.1-73.37 or later, ADC FIPS/NDcPP to 13.1.37.279 or later; upgrade Gateway to 14.1-73.37 or later, and Gateway to 13.1-64.23 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Citrix NetScaler ADC and Gateway instances and identify those running affected versions before 14.1-73.37 or 13.1-64.23, including FIPS/NDcPP builds before 14.1-73.37 and 13.1.37.279; restrict management and network access to trusted sources, and enable logging/alerting for memory exhaustion or service resets. …
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Same weakness CWE-119 – Buffer Overflow
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today