Vulnerability · CVE-2024-5491
Denial of Service in NetScaler ADC and NetScaler Gateway in NetScaler
Published Jul 10, 2024 · catalog updated Jun 17, 2026 · netscaler application delivery controller
Last checked Nov 5, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2024-5491. EPSS is 0.76%. Act only if a listed version of netscaler application delivery controller is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2026-88778 · High
- CVE-2026-88775 · High
- CVE-2026-88774 · High
- CVE-2026-88773 · Critical
- CVE-2026-88771 · Critical · known exploited
- Severity
- High7.2
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.76%
- Remediation
- Version ranges on file
- Affected products
- cpe citrix/netscaler application delivery controller
Denial of Service in NetScaler ADC and NetScaler Gateway in NetScaler
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe citrix/netscaler application delivery controller< 12.1-55.304
- cpe citrix/netscaler application delivery controller< 13.0-92.31
- cpe citrix/netscaler application delivery controller< 13.1-37.183
- cpe citrix/netscaler application delivery controller< 13.1-53.17
- cpe citrix/netscaler application delivery controller< 14.1-25.53
How to fix CVE-2024-5491
Upgrade
CVE-2024-5491 lists a fix boundary at 12.1-55.304. Compare the installed build with that boundary before you change production.
Version check
Affected < 12.1-55.304
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2024-5491. EPSS is 0.76%. Act only if a listed version of netscaler application delivery controller is installed.
Which versions are affected?
Compare what you have installed with citrix/netscaler application delivery controller < 12.1-55.304; citrix/netscaler application delivery controller < 13.0-92.31; citrix/netscaler application delivery controller < 13.1-37.183; citrix/netscaler application delivery controller < 13.1-53.17. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.76%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Technology hubs
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Jul 10, 2024 · Monitored products — critical
Detected
Denial of Service in NetScaler ADC and NetScaler Gateway in NetScaler
Jun 17, 2026 · Monitored products — critical
Updated
Denial of Service in NetScaler ADC and NetScaler Gateway in NetScaler
Sources
- CVE.orgVulnerability recordCVE-2024-5491
Official CVE identifier
cve.org - Monitored products — criticalVendor advisoryCVE-2024-5491
Denial of Service in NetScaler ADC and NetScaler Gateway in NetScaler
nvd.nist.gov
References
Freshness
Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- CVE.orgNov 4, 2026
- Monitored products — criticalNov 2, 2026