{"cve":"CVE-2021-25668","nvd":{"published":"2021-04-22T21:15:10.110","modified":"2026-06-17T03:42:19.397","status":"Modified","description":"A vulnerability has been identified in SCALANCE X200-4P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT PRO (All versions < 5.5.1), SCALANCE X202-2 IRT (All versions < 5.5.1), SCALANCE X202-2P IRT (incl. SIPLUS NET variant) (All versions < 5.5.1), SCALANCE X202-2P IRT PRO (All versions < 5.5.1), SCALANCE X204 IRT (All versions < 5.5.1), SCALANCE X204 IRT PRO (All versions < 5.5.1), SCALANCE X204-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X204-2FM (All versions < V5.2.5), SCALANCE X204-2LD (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X204-2LD TS (All versions < V5.2.5), SCALANCE X204-2TS (All versions < V5.2.5), SCALANCE X206-1 (All versions < V5.2.5), SCALANCE X206-1LD (All versions < V5.2.5), SCALANCE X208 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X208PRO (All versions < V5.2.5), SCALANCE X212-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X212-2LD (All versions < V5.2.5), SCALANCE X216 (All versions < V5.2.5), SCALANCE X224 (All versions < V5.2.5), SCALANCE XF201-3P IRT (All versions < 5.5.1), SCALANCE XF202-2P IRT (All versions < 5.5.1), SCALANCE XF204 (All versions < V5.2.5), SCALANCE XF204 IRT (All versions < 5.5.1), SCALANCE XF204-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE XF204-2BA IRT (All versions < 5.5.1), SCALANCE XF206-1 (All versions < V5.2.5), SCALANCE XF208 (All versions < V5.2.5). Incorrect processing of POST requests in the webserver may result in write out of bounds in heap. An attacker might leverage this to cause denial-of-service on the device and potentially remotely execute code.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-122","CWE-787"],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-187092.pdf","https://cert-portal.siemens.com/productcert/pdf/ssa-187092.pdf"],"products":["siemens:scalance_x200-4p_irt_firmware","siemens:scalance_x201-3p_irt_firmware","siemens:scalance_x201-3p_irt_pro_firmware","siemens:scalance_x202-2_irt_firmware","siemens:scalance_x202-2p_irt_firmware","siemens:scalance_x202-2p_irt_pro_firmware","siemens:scalance_x204-2_firmware","siemens:scalance_x204-2fm_firmware","siemens:scalance_x204-2ld_firmware","siemens:scalance_x204-2ld_ts_firmware","siemens:scalance_x204-2ts_firmware","siemens:scalance_x204_irt_firmware","siemens:scalance_x204_irt_pro_firmware","siemens:scalance_x206-1_firmware","siemens:scalance_x206-1ld_firmware","siemens:scalance_x208_firmware","siemens:scalance_x208pro_firmware","siemens:scalance_x212-2_firmware","siemens:scalance_x212-2ld_firmware","siemens:scalance_x216_firmware","siemens:scalance_x224_firmware","siemens:scalance_xf201-3p_irt_firmware","siemens:scalance_xf202-2p_irt_firmware","siemens:scalance_xf204-2_firmware","siemens:scalance_xf204-2ba_irt_firmware","siemens:scalance_xf204_firmware","siemens:scalance_xf204_irt_firmware","siemens:scalance_xf206-1_firmware","siemens:scalance_xf208_firmware"],"source":"nvd","synced_at":"2026-10-19T21:17:01.373894544+00:00"},"epss":{"cve":"CVE-2021-25668","score":0.01569,"percentile":0.75359,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}