{"id":"CVE-2021-40358","aliases":["EUVD-2021-27536","GHSA-rcjv-2hj5-3cmq"],"status":"published","title":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS...","description":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions \u003c V9.0 SP3 UC04), SIMATIC PCS 7 V9.1 (All versions \u003c V9.1 SP1), SIMATIC WinCC V15 and earlier (All versions \u003c V15 SP1 Update 7), SIMATIC WinCC V16 (All versions \u003c V16 Update 5), SIMATIC WinCC V17 (All versions \u003c V17 Update 2), SIMATIC WinCC V7.4 (All versions \u003c V7.4 SP1 Update 19), SIMATIC WinCC V7.5 (All versions \u003c V7.5 SP2 Update 5). Legitimate file operations on the web server of the affected systems do not properly neutralize special elements within the pathname. An attacker could then cause the pathname to resolve to a location outside of the restricted directory on the server and read, write or delete unexpected critical files.","severity":{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01274,"percentile":0.7011,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22"],"published":"2021-11-09T11:32:04Z","modified":"2026-06-17T04:06:47Z","products":[{"vendor":"siemens","product":"simatic pcs 7 v8.2"},{"vendor":"siemens","product":"simatic pcs 7 v9.0"},{"vendor":"siemens","product":"simatic pcs 7 v9.1"},{"vendor":"siemens","product":"simatic wincc v15 and earlier"},{"vendor":"siemens","product":"simatic wincc v16"},{"vendor":"siemens","product":"simatic wincc v17"},{"vendor":"siemens","product":"simatic wincc v7.4"},{"vendor":"siemens","product":"simatic wincc v7.5"},{"vendor":"siemens","product":"simatic_pcs_7"},{"vendor":"siemens","product":"simatic_wincc"}],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-840188.pdf","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-40358"},{"url":"https://github.com/advisories/GHSA-rcjv-2hj5-3cmq"}],"sources":{"cve":[{"id":"CVE-2021-40358","description":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions \u003c V9.0 SP3 UC04), SIMATIC PCS 7 V9.1 (All versions \u003c V9.1 SP1), SIMATIC WinCC V15 and earlier (All versions \u003c V15 SP1 Update 7), SIMATIC WinCC V16 (All versions \u003c V16 Update 5), SIMATIC WinCC V17 (All versions \u003c V17 Update 2), SIMATIC WinCC V7.4 (All versions \u003c V7.4 SP1 Update 19), SIMATIC WinCC V7.5 (All versions \u003c V7.5 SP2 Update 5). Legitimate file operations on the web server of the affected systems do not properly neutralize special elements within the pathname. An attacker could then cause the pathname to resolve to a location outside of the restricted directory on the server and read, write or delete unexpected critical files.","status":"published","published":"2021-11-09T11:32:04Z","modified":"2024-08-04T02:44:09.554Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C","level":"critical","assessor":"cna"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:33:01.495293Z"}],"euvd":[{"id":"EUVD-2021-27536","description":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions \u003c V9.0 SP3 UC04), SIMATIC PCS 7 V9.1 (All versions \u003c V9.1 SP1), SIMATIC WinCC V15 and earlier (All versions \u003c V15 SP1 Update 7), SIMATIC WinCC V16 (All versions \u003c V16 Update 5), SIMATIC WinCC V17 (All versions \u003c V17 Update 2), SIMATIC WinCC V7.4 (All versions \u003c V7.4 SP1 Update 19), SIMATIC WinCC V7.5 (All versions \u003c V7.5 SP2 Update 5). Legitimate file operations on the web server of the affected systems do not properly neutralize special elements within the pathname. An attacker could then cause the pathname to resolve to a location outside of the restricted directory on the server and read, write or delete unexpected critical files.","status":"published","published":"2021-11-09T11:32:04Z","modified":"2024-08-04T02:44:09Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C","level":"critical"}],"updated_at":"2026-11-03T03:24:20.862157Z"}],"ghsa":[{"id":"GHSA-rcjv-2hj5-3cmq","title":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS...","description":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.0 (All versions), SIMATIC PCS 7 V9.1 (All versions), SIMATIC WinCC V15 and earlier (All versions), SIMATIC WinCC V16 (All versions), SIMATIC WinCC V17 (All versions), SIMATIC WinCC V7.4 and earlier (All versions), SIMATIC WinCC V7.5 (All versions \u003c V7.5 SP2 Update 5). Legitimate file operations of the affected systems do not properly neutralize special elements within the pathname. An attacker could then cause the pathname to resolve to a location outside of the restricted directory on the server and read, write or delete unexpected critical files.","status":"published","published":"2022-05-24T19:20:10Z","modified":"2023-01-30T05:03:47Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:46:54.738868Z"}],"nvd":[{"id":"CVE-2021-40358","description":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions \u003c V9.0 SP3 UC04), SIMATIC PCS 7 V9.1 (All versions \u003c V9.1 SP1), SIMATIC WinCC V15 and earlier (All versions \u003c V15 SP1 Update 7), SIMATIC WinCC V16 (All versions \u003c V16 Update 5), SIMATIC WinCC V17 (All versions \u003c V17 Update 2), SIMATIC WinCC V7.4 (All versions \u003c V7.4 SP1 Update 19), SIMATIC WinCC V7.5 (All versions \u003c V7.5 SP2 Update 5). Legitimate file operations on the web server of the affected systems do not properly neutralize special elements within the pathname. An attacker could then cause the pathname to resolve to a location outside of the restricted directory on the server and read, write or delete unexpected critical files.","status":"published","published":"2021-11-09T12:15:09.93Z","modified":"2026-06-17T04:06:47.527Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:07:00.984108Z"}]}}