{"id":"CVE-2021-21557","aliases":["EUVD-2021-8829","GHSA-66g6-48gr-pwpc"],"status":"published","title":"Dell PowerEdge Server BIOS and select Dell Precision Rack BIOS contain an out-of-bounds array...","description":"Dell PowerEdge Server BIOS and select Dell Precision Rack BIOS contain an out-of-bounds array access vulnerability. A local malicious user with high privileges may potentially exploit this vulnerability, leading to a denial of service, arbitrary code execution, or information disclosure in System Management Mode.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00346,"percentile":0.28539,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-119","CWE-125","CWE-20"],"published":"2021-06-14T19:10:16Z","modified":"2026-06-17T03:35:46Z","products":[{"vendor":"dell","product":"poweredge bios intel 15g"},{"vendor":"dell","product":"poweredge_c4140_firmware"},{"vendor":"dell","product":"poweredge_c6420_firmware"},{"vendor":"dell","product":"poweredge_c6525_firmware"},{"vendor":"dell","product":"poweredge_fc640_firmware"},{"vendor":"dell","product":"poweredge_m640_firmware"},{"vendor":"dell","product":"poweredge_m640p_firmware"},{"vendor":"dell","product":"poweredge_mx740c_firmware"},{"vendor":"dell","product":"poweredge_mx840c_firmware"},{"vendor":"dell","product":"poweredge_r240_firmware"},{"vendor":"dell","product":"poweredge_r340_firmware"},{"vendor":"dell","product":"poweredge_r440_firmware"},{"vendor":"dell","product":"poweredge_r540_firmware"},{"vendor":"dell","product":"poweredge_r640_firmware"},{"vendor":"dell","product":"poweredge_r6415_firmware"},{"vendor":"dell","product":"poweredge_r6515_firmware"},{"vendor":"dell","product":"poweredge_r6525_firmware"},{"vendor":"dell","product":"poweredge_r740_firmware"},{"vendor":"dell","product":"poweredge_r740xd2_firmware"},{"vendor":"dell","product":"poweredge_r740xd_firmware"},{"vendor":"dell","product":"poweredge_r7415_firmware"},{"vendor":"dell","product":"poweredge_r7425_firmware"},{"vendor":"dell","product":"poweredge_r7515_firmware"},{"vendor":"dell","product":"poweredge_r7525_firmware"},{"vendor":"dell","product":"poweredge_r840_firmware"},{"vendor":"dell","product":"poweredge_r940_firmware"},{"vendor":"dell","product":"poweredge_r940xa_firmware"},{"vendor":"dell","product":"poweredge_t140_firmware"},{"vendor":"dell","product":"poweredge_t340_firmware"},{"vendor":"dell","product":"poweredge_t440_firmware"},{"vendor":"dell","product":"poweredge_t640_firmware"},{"vendor":"dell","product":"poweredge_xr2_firmware"}],"references":[{"url":"https://www.dell.com/support/kbdoc/000187958","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21557"},{"url":"https://github.com/advisories/GHSA-66g6-48gr-pwpc"}],"sources":{"cve":[{"id":"CVE-2021-21557","description":"Dell PowerEdge Server BIOS and select Dell Precision Rack BIOS contain an out-of-bounds array access vulnerability. 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A local malicious user with high privileges may potentially exploit this vulnerability, leading to a denial of service, arbitrary code execution, or information disclosure in System Management Mode.","status":"published","published":"2022-05-24T19:05:16Z","modified":"2023-01-30T05:02:06Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"cwes":["CWE-119","CWE-125"],"updated_at":"2026-11-02T14:46:33.666288Z"}],"nvd":[{"id":"CVE-2021-21557","description":"Dell PowerEdge Server BIOS and select Dell Precision Rack BIOS contain an out-of-bounds array access vulnerability. 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