What is the CVSS score of CVE-2024-5491?

CVE-2024-5491 has a CVSS 4.0 base score of 7.2 (High). CVSS vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N. EPSS exploitation probability: 0.8%.

Netscaler Gateway CVE-2024-5491

HIGH

2024-07-10 secure@citrix.com

Denial Of Service Citrix Netscaler Application Delivery Controller Netscaler Gateway

7.2

CVSS 4.0 · Vendor: citrix

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Vulnerability Assessment

Impact	CVSS score of 7.2 (HIGH). Attack characteristics: adjacent network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.8% exploitation probability (EPSS)

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AnalysisAI

Denial of Service in NetScaler ADC and NetScaler Gateway in NetScaler. Rated high severity (CVSS 7.2), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

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Technical ContextAI · show details

Denial of Service in NetScaler ADC and NetScaler Gateway in NetScaler Affected products include: Citrix Netscaler Application Delivery Controller, Citrix Netscaler Gateway.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (citrix) PRIMARY 7.2 HIGH

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

Primary rating from Vendor (citrix) · only source for this CVE.

CVSS VectorVendor: citrix

Attack Vector

Adjacent

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

Vulnerable system: Confidentiality

High

Vulnerable system: Integrity

Low

Vulnerable system: Availability

High

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

DescriptionCVE.org

Denial of Service in NetScaler ADC and NetScaler Gateway in NetScaler

Threat Intelligence Overview

EPSS Score

0.8%

Top 49% exploitable

Data Quality

2 sources

Confidence: Low

Citrix

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.8%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Controlled

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +36

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)CVE.org

cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*

cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*

cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*

cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*

cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*

cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*

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References

Advisories & patches

ADVISORY https://support.citrix.com/external/article?articleUrl=CTX677944-netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20245491-and-cve20245492 REF https://support.citrix.com/article/CTX677944/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20245491-and-cve20245492

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