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CVE-2025-6543

Memory overflow vulnerability leading to unintended control flow and Denial of Service in NetScaler ADC and NetScaler Gateway when configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7e453dca8510a1f066b86170b59e2c58c244af5b75312170878d67091edb09f5
Known exploited
CISA KEV
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Gateway","vendor":"NetScaler","versions":[{"lessThan":"47.46","status":"affected","version":"14.1","versionType":"patch"},{"lessThan":"59.19","status":"affected","version":"13.1","versionType":"patch"},{"lessThan":"37.236","status":"affected","version":"13.1 FIPS and NDcPP","versionType":"patch"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e641ebfa6e69121c94d62efb19d6d3f534e6af36feb29156d8c8bed3516d2a01 · sha256:8fb73defe2c69ff5… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"ADC","vendor":"NetScaler","versions":[{"lessThan":"47.46","status":"affected","version":"14.1","versionType":"patch"},{"lessThan":"59.19","status":"affected","version":"13.1","versionType":"patch"},{"lessThan":"37.236","status":"affected","version":"13.1 FIPS and NDcPP","versionType":"patch"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e641ebfa6e69121c94d62efb19d6d3f534e6af36feb29156d8c8bed3516d2a01 · sha256:8fb73defe2c69ff5… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Gateway","vendor":"NetScaler","versions":[{"lessThan":"47.46","status":"affected","version":"14.1","versionType":"patch"},{"lessThan":"59.19","status":"affected","version":"13.1","versionType":"patch"},{"lessThan":"37.236","status":"affected","version":"13.1 FIPS and NDcPP","versionType":"patch"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e641ebfa6e69121c94d62efb19d6d3f534e6af36feb29156d8c8bed3516d2a01 · sha256:8fb73defe2c69ff5… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"ADC","vendor":"NetScaler","versions":[{"lessThan":"47.46","status":"affected","version":"14.1","versionType":"patch"},{"lessThan":"59.19","status":"affected","version":"13.1","versionType":"patch"},{"lessThan":"37.236","status":"affected","version":"13.1 FIPS and NDcPP","versionType":"patch"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e641ebfa6e69121c94d62efb19d6d3f534e6af36feb29156d8c8bed3516d2a01 · sha256:8fb73defe2c69ff5… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.2,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e641ebfa6e69121c94d62efb19d6d3f534e6af36feb29156d8c8bed3516d2a01 · sha256:8fb73defe2c69ff5… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-119","description":"CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e641ebfa6e69121c94d62efb19d6d3f534e6af36feb29156d8c8bed3516d2a01 · sha256:8fb73defe2c69ff5… · /containers/cna/problemTypes/0/descriptions/0

Known exploitation assertions

2 source assertions
{"cwes":["CWE-119"],"dateAdded":"2025-06-30","dueDate":"2025-07-21","knownRansomwareCampaignUse":"Unknown","notes":"https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788 ; https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/ ; https://nvd.nist.gov/vuln/detail/CVE-2025-6543","product":"NetScaler ADC and Gateway","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","shortDescription…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:c722b469ff67a82aa4e81a4b5deaca42f3f703bae006f9dd9f8aed2a96b24bb8 · sha256:16acee8334e59e44… · /vulnerabilities/286
    Open source location →
{"cwes":["CWE-119"],"dateAdded":"2025-06-30","dueDate":"2025-07-21","knownRansomwareCampaignUse":"Unknown","notes":"https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788 ; https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/ ; https://nvd.nist.gov/vuln/detail/CVE-2025-6543","product":"NetScaler ADC and Gateway","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","shortDescription…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:7e365eb971417535e1ff320bef71ebed186b00b0861d1611662b95e5796d33e9 · sha256:635dff916c4092c0… · /vulnerabilities/289
    Open source location →

Source references

2 source assertions
{"url":"https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e641ebfa6e69121c94d62efb19d6d3f534e6af36feb29156d8c8bed3516d2a01 · sha256:8fb73defe2c69ff5… · /containers/cna/references/0
{"tags":["government-resource"],"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-6543"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e641ebfa6e69121c94d62efb19d6d3f534e6af36feb29156d8c8bed3516d2a01 · sha256:8fb73defe2c69ff5… · /containers/adp/0/references/0

Attribution and limitations

  • CISA Known Exploited Vulnerabilities JSON: CISA named for provenance; do not use CISA/DHS marks or imply endorsement Source →
  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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