{"answers":{"affected":"It affects 2 products.","exploited":"Yes. Attackers have exploited CVE-2025-6543 in the wild since at least 30 Jun 2025.","fix":"No fix has been published for CVE-2025-6543 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 21 Jul 2025.","what":"CVE-2025-6543 is a critical memory corruption vulnerability in NetScaler ADC, published on 25 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-6543 and fix it if it is affected.\n\nWhat it is: CVE-2025-6543 is a critical memory corruption vulnerability in NetScaler ADC, published on 25 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2025-6543 in the wild since at least 30 Jun 2025.\n\nAffected product: NetScaler ADC. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-6543/ (Markdown: https://insights.sbomify.com/CVE-2025-6543/index.md)","id":"CVE-2025-6543","markdown":"https://insights.sbomify.com/CVE-2025-6543/index.md","name":"CVE-2025-6543","record":{"aliases":["GHSA-9gqr-6728-fpv3"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"NetScaler ADC Gateway","requires_auth":"none","summary":"Attackers can cause memory overflow leading to denial of service or unintended control flow in NetScaler Gateway or AAA virtual servers.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Citrix","cpe":[{"product":"netscaler_application_delivery_controller","vendor":"citrix"},{"product":"netscaler_gateway","vendor":"citrix"}],"cvss":{"score":9.2,"severity":"critical","source":"cna","vector":"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"},"cwes":[{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"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","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2025-06-26","github_poc":3,"max_poc_stars":6,"metasploit":0,"nuclei":0,"refs":[{"date":"2025-07-03T20:02:39Z","kind":"github_poc","ref":"https://github.com/abrewer251/CVE-2025-6543_CitrixNetScaler_PoC","stars":6,"title":"Multi-host, multi-port scanner and auditor for CVE-2025-6543-affected NetScaler devices. Supports SNMP and SSH enumeration with optional CSV reporting and exploit stubs."},{"date":"2025-06-26T15:05:43Z","kind":"github_poc","ref":"https://github.com/grupooruss/Citrix-cve-2025-6543","stars":5,"title":"Script para determinar si Citrix es vulnerable al CVE-2025-6543 "},{"date":"2025-06-30T13:07:55Z","kind":"github_poc","ref":"https://github.com/lex1010/CVE-2025-6543","stars":0,"title":"Citrix Bleed 2 PoC"}],"tier":"exploited"},"has_fix":null,"headline":"Citrix NetScaler ADC and Gateway Buffer Overflow","id":"CVE-2025-6543","indexable":true,"kev":{"dateAdded":"2025-06-30","dueDate":"2025-07-21","knownRansomwareCampaignUse":"Unknown","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.","vendorProject":"Citrix","vulnerabilityName":"Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2025"},"n_packages":0,"n_references":1,"next":{"headline":"Deserialization Vulnerability in h2oai/h2o-3","id":"CVE-2025-6544"},"packages":[],"prev":{"headline":"OS command injection in multiple parameters","id":"CVE-2025-6542"},"products":["ADC","Gateway"],"published":"2025-06-25","related":[{"cvss_score":9.8,"headline":"Citrix NetScaler ADC and NetScaler Gateway Code Injection","id":"CVE-2023-3519","kev_date_added":"2023-07-19","published":"2023-07-19"},{"cvss_score":9.5,"headline":"Citrix NetScaler Improper Input Validation","id":"CVE-2026-88771","kev_date_added":"2026-09-27","published":"2026-09-27"},{"cvss_score":9.5,"headline":"Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer","id":"CVE-2026-88772","kev_date_added":"2026-09-27","published":"2026-09-27"},{"cvss_score":9.4,"headline":"Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow","id":"CVE-2023-4966","kev_date_added":"2023-10-18","published":"2023-10-10"},{"cvss_score":9.3,"headline":"Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel","id":"CVE-2026-19490","kev_date_added":"2026-09-09","published":"2026-08-19"},{"cvss_score":9.3,"headline":"Citrix NetScaler Out-of-Bounds Read","id":"CVE-2026-3055","kev_date_added":"2026-03-30","published":"2026-03-23"},{"cvss_score":9.3,"headline":"Citrix NetScaler ADC and Gateway Out-of-Bounds Read","id":"CVE-2025-5777","kev_date_added":"2025-07-10","published":"2025-06-17"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-02-26","vendors":["NetScaler"]},"summary":"Attackers can cause memory overflow leading to denial of service or unintended control flow in NetScaler Gateway or AAA virtual servers.","url":"https://insights.sbomify.com/CVE-2025-6543/"}