{"answers":{"affected":"It affects 1 product.","exploited":"Yes. Attackers have exploited CVE-2021-35211 in the wild since at least 3 Nov 2021, including in ransomware campaigns.","fix":"No fix has been published for CVE-2021-35211 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Nov 2021.","what":"CVE-2021-35211 is a critical memory corruption vulnerability in Solarwinds Serv-U, published on 14 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-35211 and fix it if it is affected.\n\nWhat it is: CVE-2021-35211 is a critical memory corruption vulnerability in Solarwinds Serv-U, published on 14 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2021-35211 in the wild since at least 3 Nov 2021, including in ransomware campaigns.\n\nAffected product: Solarwinds Serv-U. 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-2021-35211/ (Markdown: https://insights.sbomify.com/CVE-2021-35211/index.md)","id":"CVE-2021-35211","markdown":"https://insights.sbomify.com/CVE-2021-35211/index.md","name":"CVE-2021-35211","record":{"aliases":["GHSA-cpmg-9xq8-3934"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Managed File Transfer Server","requires_auth":"none","summary":"Remote attackers can exploit a memory corruption flaw in Serv-U to execute arbitrary code and gain privileged access to the host system.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"SolarWinds","cpe":[{"product":"serv-u","vendor":"solarwinds"}],"cvss":{"score":9,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"Microsoft discovered a remote code execution (RCE) vulnerability in the SolarWinds Serv-U product utilizing a Remote Memory Escape Vulnerability. If exploited, a threat actor may be able to gain privileged access to the machine hosting Serv-U Only. SolarWinds Serv-U Managed File Transfer and Serv-U Secure FTP for Windows before 15.2.3 HF2 are affected by this vulnerability.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2021-09-30","github_poc":3,"max_poc_stars":38,"metasploit":0,"nuclei":1,"refs":[{"date":"2022-01-14T05:52:17Z","kind":"github_poc","ref":"https://github.com/BishopFox/CVE-2021-35211","stars":38,"title":null},{"date":"2021-09-30T01:45:42Z","kind":"github_poc","ref":"https://github.com/NattiSamson/Serv-U-CVE-2021-35211","stars":12,"title":"Simple Serv-U CVE-2021-35211 PoC"},{"date":"2021-10-24T06:51:16Z","kind":"github_poc","ref":"https://github.com/0xhaggis/CVE-2021-35211","stars":1,"title":"Serv-U-FTP CVE-2021-35211 exploit"},{"date":null,"kind":"nuclei","ref":"javascript/cves/2021/CVE-2021-35211.yaml","stars":null,"title":"SolarWinds Serv-U FTP - Remote Code Execution"}],"tier":"exploited"},"has_fix":null,"headline":"SolarWinds Serv-U Remote Code Execution","id":"CVE-2021-35211","indexable":true,"kev":{"dateAdded":"2021-11-03","dueDate":"2021-11-17","knownRansomwareCampaignUse":"Known","product":"Serv-U","requiredAction":"Apply updates per vendor instructions.","vendorProject":"SolarWinds","vulnerabilityName":"SolarWinds Serv-U Remote Code Execution Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":"solarwinds:serv-u","products":["solarwinds:serv-u"],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Blind SQL injection Vulnerability","id":"CVE-2021-35212"},"packages":[],"prev":{"headline":"Cross site scripting in the system log","id":"CVE-2021-35210"},"products":["Serv-U Managed File Transfer Server and Serv-U Secured FTP"],"published":"2021-07-14","related":[{"cvss_score":8.6,"headline":"SolarWinds Serv-U Path Traversal Vulnerability","id":"CVE-2024-28995","kev_date_added":"2024-07-17","published":"2024-06-06"},{"cvss_score":7.5,"headline":"SolarWinds Serv-U Uncontrolled Resource Consumption","id":"CVE-2026-28318","kev_date_added":"2026-06-05","published":"2026-06-04"},{"cvss_score":4.3,"headline":"SolarWinds Serv-U Improper Input Validation","id":"CVE-2021-35247","kev_date_added":"2022-01-21","published":"2022-01-07"},{"cvss_score":9.8,"headline":"Code injection in n/a","id":"CVE-2020-35481","kev_date_added":null,"published":"2021-02-03"},{"cvss_score":9.1,"headline":"SolarWinds Serv-U Insecure Direct Object Reference (IDOR) Vulnerability","id":"CVE-2026-28302","kev_date_added":null,"published":"2026-07-21"},{"cvss_score":9.1,"headline":"SolarWinds Serv-U Remote Code Execution Vulnerability","id":"CVE-2026-28304","kev_date_added":null,"published":"2026-07-21"}],"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":"total"},"state":"PUBLISHED","updated":"2025-10-21","vendors":["SolarWinds"]},"summary":"Remote attackers can exploit a memory corruption flaw in Serv-U to execute arbitrary code and gain privileged access to the host system.","url":"https://insights.sbomify.com/CVE-2021-35211/"}