{"cve":"CVE-2021-29998","nvd":{"published":"2021-04-13T17:15:12.310","modified":"2026-06-17T03:48:34.877","status":"Modified","description":"An issue was discovered in Wind River VxWorks before 6.5. There is a possible heap overflow in dhcp client.","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-787"],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-560465.pdf","https://cert-portal.siemens.com/productcert/pdf/ssa-910883.pdf","https://support2.windriver.com/index.php?page=security-notices","https://us-cert.cisa.gov/ics/advisories/icsa-21-194-12","https://cert-portal.siemens.com/productcert/pdf/ssa-560465.pdf"],"products":["siemens:ruggedcom_win_subscriber_station_firmware","siemens:scalance_x200-4_p_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_x208_pro_firmware","siemens:scalance_x212-2_firmware","siemens:scalance_x212-2ld_firmware","siemens:scalance_x216_firmware","siemens:scalance_x224_firmware","siemens:scalance_x300_firmware","siemens:scalance_x408_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","siemens:simatic_rf_181_eip_firmware","siemens:simatic_rf_182c_firmware","siemens:sinamics_perfect_harmony_gh180_firmware","windriver:vxworks"],"source":"nvd","synced_at":"2026-10-19T21:17:01.373894544+00:00"},"epss":{"cve":"CVE-2021-29998","score":0.02393,"percentile":0.83984,"date":"2026-10-31"},"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."]}