{"id":"CVE-2021-26731","aliases":["EUVD-2021-13518","GHSA-9wgq-fhm2-pjf3"],"status":"published","title":"spx_restservice modifyUserb_func Command Injection and Multiple Stack-Based Buffer Overflows","description":"Command injection and multiple stack-based buffer overflows vulnerabilities in the modifyUserb_func function of spx_restservice allow an authenticated attacker to execute arbitrary code with the same privileges as the server user (root). This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.02744,"percentile":0.86385,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121","CWE-77","CWE-787","CWE-94"],"published":"2022-10-24T00:00:00Z","modified":"2026-06-17T03:43:44Z","products":[{"vendor":"lanner inc","product":"iac-ast2500a"},{"vendor":"lannerinc","product":"iac-ast2500a_firmware"}],"references":[{"url":"https://www.nozominetworks.com/blog/vulnerabilities-in-bmc-firmware-affect-ot-iot-device-security-part-1/","tags":["x_transferred","Third Party Advisory"]},{"url":"https://www.nozominetworks.com/labs/vulnerability-advisories/cve-2021-26731/","tags":["x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26731"},{"url":"https://github.com/CVEProject/cvelist/blob/master/2021/26xxx/CVE-2021-26731.json"},{"url":"https://www.nozominetworks.com/blog/vulnerabilities-in-bmc-firmware-affect-ot-iot-device-security-part-1"},{"url":"https://www.nozominetworks.com/labs/vulnerability-advisories/CVE-2021-26731"},{"url":"https://github.com/advisories/GHSA-9wgq-fhm2-pjf3"}],"sources":{"cve":[{"id":"CVE-2021-26731","title":"spx_restservice modifyUserb_func Command Injection and Multiple Stack-Based Buffer Overflows","description":"Command injection and multiple stack-based buffer overflows vulnerabilities in the modifyUserb_func function of spx_restservice allow an authenticated attacker to execute arbitrary code with the same privileges as the server user (root). This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.","status":"published","published":"2022-10-24T00:00:00Z","modified":"2025-05-07T15:42:28.469Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-94","CWE-121"],"updated_at":"2026-11-02T14:32:57.033395Z"}],"euvd":[{"id":"EUVD-2021-13518","description":"Command injection and multiple stack-based buffer overflows vulnerabilities in the modifyUserb_func function of spx_restservice allow an authenticated attacker to execute arbitrary code with the same privileges as the server user (root). This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.","status":"published","published":"2022-10-24T00:00:00Z","modified":"2025-05-07T15:42:28Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T20:32:53.098709Z"}],"ghsa":[{"id":"GHSA-9wgq-fhm2-pjf3","title":"Command injection and multiple stack-based buffer overflows vulnerabilities in the...","description":"Command injection and multiple stack-based buffer overflows vulnerabilities in the modifyUserb_func function of spx_restservice allow an attacker to execute arbitrary code with the same privileges as the server user (root). This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.","status":"published","published":"2022-10-24T19:00:17Z","modified":"2024-09-30T15:31:45Z","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-77","CWE-121"],"updated_at":"2026-11-02T14:58:22.484222Z"}],"nvd":[{"id":"CVE-2021-26731","description":"Command injection and multiple stack-based buffer overflows vulnerabilities in the modifyUserb_func function of spx_restservice allow an authenticated attacker to execute arbitrary code with the same privileges as the server user (root). This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.","status":"published","published":"2022-10-24T14:15:48.3Z","modified":"2026-06-17T03:43:44.61Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/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":"primary"}],"cwes":["CWE-94","CWE-121","CWE-77","CWE-787"],"updated_at":"2026-11-02T14:07:06.906968Z"}]}}