Citrix ADC and Citrix/NetScaler Gateway 13.0 before 13.0-76.29, 12.1-61.18, 11.1-65.20, Citrix ADC 12.1-FIPS before 12.1-55.238, and Citrix SD-WAN WANOP Edition before 11.4.0, 11.3.2, 11.3.1a, 11.2.3a, 11.1.2c, 10.2.9a suffers from uncontrolled resource consumption by way of a network-based denial-of-service from within the same Layer 2 network segment. Note that the attacker must be in the same Layer 2 network segment as the vulnerable appliance.
CVSS v4.0 Metrics
Exploitability
Attack VectorAdjacent
ComplexityLow
RequirementsPresent
PrivilegesNone
User InteractionNone
Threat
Exploit MaturityUnreported
Vulnerable System
ConfidentialityNone
IntegrityNone
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | nvd | AV: P→A, AC: H→L, PR: H→N, UI: A→N, VA: N→H | 0.0 → 2.3 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 0.0 |
Affected Software
| Vendor | Product | Version |
|---|
| citrix | application_delivery_controller_firmware | ≥ 12.1, < 12.1-61.18 |
| citrix | application_delivery_controller_firmware | ≥ 13.0, < 13.0-76.29 |
| citrix | application_delivery_controller_firmware | ≥ 12.1, < 12.1-55.238 |
| citrix | application_delivery_controller_firmware | ≥ 11.1, < 11.1-65.20 |
| citrix | gateway | ≥ 12.1, < 12.1-61.18 |
| citrix | gateway | ≥ 13.0, < 13.0-76.29 |
| citrix | netscaler_gateway | ≥ 11.1, < 11.1-65.20 |
| citrix | sd-wan_wanop | ≥ 10.2, < 10.2.9a |
| citrix | sd-wan_wanop | ≥ 11.1, < 11.1.2c |
| citrix | sd-wan_wanop | ≥ 11.2, < 11.2.3a |
| citrix | sd-wan_wanop | ≥ 11.3, < 11.3.2 |
| n/a | Citrix ADC, Citrix Gateway, Citrix SD-WAN WANOP Edition | > 13.0-76.29 and later releases of, < 55.238 and later releases of 12. |
Published: 2021-06-16
