{"answers":{"affected":"It affects 1 product.","exploited":"Yes. Attackers have exploited CVE-2019-5591 in the wild since at least 3 Nov 2021, including in ransomware campaigns.","fix":"No fix has been published for CVE-2019-5591 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 May 2022.","what":"CVE-2019-5591 is a medium-severity vulnerability in Fortinet Fortios, published on 14 Aug 2020. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2019-5591 and fix it if it is affected.\n\nWhat it is: CVE-2019-5591 is a medium-severity vulnerability in Fortinet Fortios, published on 14 Aug 2020. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2019-5591 in the wild since at least 3 Nov 2021, including in ransomware campaigns.\n\nAffected product: Fortinet Fortios. 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-2019-5591/ (Markdown: https://insights.sbomify.com/CVE-2019-5591/index.md)","id":"CVE-2019-5591","markdown":"https://insights.sbomify.com/CVE-2019-5591/index.md","name":"CVE-2019-5591","record":{"aliases":["GHSA-p9g8-h33v-mg42"],"analysis":{"component_type":"network_device","fix_type":"configuration_change","impacts":["data_read","security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Fortinet FortiOS","requires_auth":"none","summary":"An unauthenticated attacker on the same subnet can intercept sensitive information by impersonating the LDAP server due to default configuration settings.","user_interaction":"not_required","vuln_class":"misconfiguration"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"fortinet","cpe":[{"product":"fortios","vendor":"fortinet"}],"cvss":{"score":6.5,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"}],"description":"A Default Configuration vulnerability in FortiOS may allow an unauthenticated attacker on the same subnet to intercept sensitive information by impersonating the LDAP server.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2025-10-16","github_poc":1,"max_poc_stars":1,"metasploit":0,"nuclei":1,"refs":[{"date":"2025-10-16T22:18:09Z","kind":"github_poc","ref":"https://github.com/ayewo/fortios-ldap-mitm-poc-CVE-2019-5591","stars":1,"title":"The default configuration of LDAP on FortiOS v6.0.x to v6.2.0 does not check server identity for LDAP/S leading to MITM attacks. This PoC demos full exfiltration of credentials sent on the local subnet to an LDAP server that is easily impersonated. "},{"date":null,"kind":"nuclei","ref":"http/cves/2019/CVE-2019-5591.yaml","stars":null,"title":"FortiOS - Insecure LDAP Configuration Detection"}],"tier":"exploited"},"has_fix":null,"headline":"Fortinet FortiOS Default Configuration","id":"CVE-2019-5591","indexable":true,"kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","knownRansomwareCampaignUse":"Known","product":"FortiOS","requiredAction":"Apply updates per vendor instructions.","vendorProject":"Fortinet","vulnerabilityName":"Fortinet FortiOS Default Configuration Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":"fortinet:fortios","products":["fortinet:fortios"],"type":"misconfiguration","year":"2019"},"n_packages":0,"n_references":1,"next":{"headline":"Information disclosure in Fortinet IPS Engine","id":"CVE-2019-5592"},"packages":[],"prev":{"headline":"Cross-site scripting in FortiWeb","id":"CVE-2019-5590"},"products":["Fortinet FortiOS"],"published":"2020-08-14","related":[{"cvss_score":9.8,"headline":"Fortinet Multiple Products Format String","id":"CVE-2024-23113","kev_date_added":"2024-10-09","published":"2024-02-15"},{"cvss_score":9.8,"headline":"Fortinet Multiple Products Authentication Bypass","id":"CVE-2022-40684","kev_date_added":"2022-10-11","published":"2022-10-18"},{"cvss_score":9.6,"headline":"Fortinet FortiOS and FortiProxy Authentication Bypass","id":"CVE-2024-55591","kev_date_added":"2025-01-14","published":"2025-01-14"},{"cvss_score":9.6,"headline":"Fortinet FortiOS Out-of-Bound Write","id":"CVE-2024-21762","kev_date_added":"2024-02-09","published":"2024-02-09"},{"cvss_score":9.3,"headline":"Fortinet FortiOS Heap-Based Buffer Overflow","id":"CVE-2022-42475","kev_date_added":"2022-12-13","published":"2023-01-02"},{"cvss_score":9.2,"headline":"Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow","id":"CVE-2023-27997","kev_date_added":"2023-06-13","published":"2023-06-13"},{"cvss_score":9.1,"headline":"Fortinet Multiple Products Improper Verification of Cryptographic Signature","id":"CVE-2025-59718","kev_date_added":"2025-12-16","published":"2025-12-09"}],"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":"attribution","licence":"MIT","name":"Nuclei templates"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"active","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-15","vendors":["Fortinet"]},"summary":"An unauthenticated attacker on the same subnet can intercept sensitive information by impersonating the LDAP server due to default configuration settings.","url":"https://insights.sbomify.com/CVE-2019-5591/"}