{"id":"CVE-2023-6548","published":"2024-01-17T20:15:50Z","modified":"2026-06-17T06:50:58Z","title":"Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability","vendor":"Citrix","product":"NetScaler ADC and NetScaler Gateway","tier":"core","eol":null,"description":{"text":"Improper Control of Generation of Code ('Code Injection') in NetScaler ADC and NetScaler Gateway allows an attacker with access to NSIP, CLIP or SNIP with management interface to perform Authenticated (low privileged) remote code execution on Management Interface.","provenance":"source","from":"NVD"},"summary":{"text":"Citrix NetScaler ADC and NetScaler Gateway contain a code injection flaw (CWE: Improper Control of Generation of Code) in the component that handles management interface functionality. An attacker who can reach the NSIP, CLIP or SNIP with management interface, and who holds low-privileged authenticated access, can execute arbitrary code remotely on the management interface.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:13:51Z"},"cvss":{"score":8.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.03191,"percentile":0.88065,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2024-01-17","dueDate":"2024-01-24","ransomware":false,"requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","notes":"https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549;   https://nvd.nist.gov/vuln/detail/CVE-2023-6548","provenance":"source"},"vulncheckKev":{"dateAdded":"2024-01-16","exploitedFirstSeen":"2024-01-16","ransomware":false,"evidence":[{"url":"https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549","date":"2024-01-16"},{"url":"https://www.tenable.com/blog/cve-2023-6548-cve-2023-6549-zero-day-vulnerabilities-netscaler-adc-gateway-exploited","date":"2024-01-16"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2024-01-17"},{"url":"https://redsense.com/publications/yearly-intel-trend-review-2023/","date":"2024-01-30"},{"url":"https://www.cert.europa.eu/publications/threat-intelligence/tlr2024/pdf","date":"2025-02-25"},{"url":"https://www.tenable.com/blog/verizon-2025-dbir-tenable-research-collaboration","date":"2025-04-23"},{"url":"https://www.verizon.com/business/resources/T32e/reports/2025-dbir-data-breach-investigations-report.pdf","date":"2025-04-25"},{"url":"https://www.morphisec.com/blog/the-top-exploited-vulnerabilities-leading-to-ransomware-in-2025-and-how-to-stay-ahead/","date":"2025-09-18"}],"evidenceTotal":8,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 30, 2026","url":"https://otx.alienvault.com/pulse/6ae35d889ea92b4ce19c2680","created":"2026-10-29"},{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"}],"provenance":"machine"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"}],"references":[{"url":"https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549","tags":["Vendor Advisory"]},{"url":"https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549","tags":["Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-6548","tags":["US Government Resource"]}],"techniques":[{"id":"T1055","name":"Process Injection","tactics":["privilege-escalation","stealth"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Code Injection","mappingType":"exploitation_technique","evidence":[],"comment":"This vulnerability allows for authenticated (low-privilege) remote code execution via code injection.","confidence":"high"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2023-58778","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-58778","exploited":true,"exploitedSince":"2024-01-17","provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1055"],"provenance":"source"}],"timeline":[{"date":"2024-01-16","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549","provenance":"source"},{"date":"2024-01-17","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-6548","provenance":"source"},{"date":"2024-01-17","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2024-01-17","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-58778","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":0},"priority":{"score":61.8,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 1018 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":17.61,"detail":"percentile 0.8807"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":6.16,"detail":"base score 8.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}