{"id":"CVE-2021-25673","aliases":["EUVD-2021-12565","GHSA-cxqw-29jq-pcjv"],"status":"published","title":"A vulnerability has been identified in SIMATIC S7-PLCSIM V5.4 (All versions). An attacker with...","description":"A vulnerability has been identified in SIMATIC S7-PLCSIM V5.4 (All versions). An attacker with local access to the system could cause a Denial-of-Service condition in the application when it is used to open a specially crafted file. As a consequence, the application could enter an infinite loop, become unresponsive and must be restarted to restore the service.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00231,"percentile":0.14078,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-835"],"published":"2021-03-15T17:03:31Z","modified":"2026-06-17T03:42:20Z","products":[{"vendor":"siemens","product":"simatic s7-plcsim v5.4"},{"vendor":"siemens","product":"simatic_s7-plcsim"}],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-256092.pdf","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25673"},{"url":"https://github.com/advisories/GHSA-cxqw-29jq-pcjv"}],"sources":{"cve":[{"id":"CVE-2021-25673","description":"A vulnerability has been identified in SIMATIC S7-PLCSIM V5.4 (All versions). An attacker with local access to the system could cause a Denial-of-Service condition in the application when it is used to open a specially crafted file. As a consequence, the application could enter an infinite loop, become unresponsive and must be restarted to restore the service.","status":"published","published":"2021-03-15T17:03:31Z","modified":"2024-08-03T20:11:28.393Z","cwes":["CWE-835"],"updated_at":"2026-11-02T14:32:59.430294Z"}],"euvd":[{"id":"EUVD-2021-12565","description":"A vulnerability has been identified in SIMATIC S7-PLCSIM V5.4 (All versions). An attacker with local access to the system could cause a Denial-of-Service condition in the application when it is used to open a specially crafted file. As a consequence, the application could enter an infinite loop, become unresponsive and must be restarted to restore the service.","status":"published","published":"2021-03-15T17:03:31Z","modified":"2024-08-03T20:11:28Z","updated_at":"2026-11-03T03:24:52.420769Z"}],"ghsa":[{"id":"GHSA-cxqw-29jq-pcjv","title":"A vulnerability has been identified in SIMATIC S7-PLCSIM V5.4 (All versions). An attacker with...","description":"A vulnerability has been identified in SIMATIC S7-PLCSIM V5.4 (All versions). An attacker with local access to the system could cause a Denial-of-Service condition in the application when it is used to open a specially crafted file. As a consequence, the application could enter an infinite loop, become unresponsive and must be restarted to restore the service.","status":"published","published":"2022-05-24T17:44:34Z","modified":"2023-01-29T05:05:41Z","cwes":["CWE-835"],"updated_at":"2026-11-02T14:45:51.307262Z"}],"nvd":[{"id":"CVE-2021-25673","description":"A vulnerability has been identified in SIMATIC S7-PLCSIM V5.4 (All versions). An attacker with local access to the system could cause a Denial-of-Service condition in the application when it is used to open a specially crafted file. As a consequence, the application could enter an infinite loop, become unresponsive and must be restarted to restore the service.","status":"published","published":"2021-03-15T17:15:21.847Z","modified":"2026-06-17T03:42:20.133Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.9,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary"}],"cwes":["CWE-835"],"updated_at":"2026-11-02T14:06:50.805771Z"}]}}