{"id":"CVE-2023-20821","aliases":["EUVD-2023-25000","GHSA-9vcq-gvpp-5xgr"],"status":"published","title":"In nvram, there is a possible out of bounds write due to a missing bounds check. This could lead...","description":"In nvram, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07937113; Issue ID: ALPS07937113.","severity":{"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","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00092,"percentile":0.005,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2023-09-04T02:27:17Z","modified":"2026-06-17T05:30:56Z","products":[{"vendor":"google","product":"android"},{"vendor":"linuxfoundation","product":"yocto"},{"vendor":"mediatek","product":"mt2713"},{"vendor":"mediatek","product":"mt2735"},{"vendor":"mediatek","product":"mt6833"},{"vendor":"mediatek","product":"mt6835"},{"vendor":"mediatek","product":"mt6853"},{"vendor":"mediatek","product":"mt6855"},{"vendor":"mediatek","product":"mt6873"},{"vendor":"mediatek","product":"mt6875"},{"vendor":"mediatek","product":"mt6877"},{"vendor":"mediatek","product":"mt6879"},{"vendor":"mediatek","product":"mt6880"},{"vendor":"mediatek","product":"mt6883"},{"vendor":"mediatek","product":"mt6885"},{"vendor":"mediatek","product":"mt6886"},{"vendor":"mediatek","product":"mt6889"},{"vendor":"mediatek","product":"mt6890"},{"vendor":"mediatek","product":"mt6891"},{"vendor":"mediatek","product":"mt6893"},{"vendor":"mediatek","product":"mt6895"},{"vendor":"mediatek","product":"mt6980"},{"vendor":"mediatek","product":"mt6983"},{"vendor":"mediatek","product":"mt6985"},{"vendor":"mediatek","product":"mt6990"},{"vendor":"mediatek","product":"mt8167"},{"vendor":"mediatek","product":"mt8167s"},{"vendor":"mediatek","product":"mt8168"},{"vendor":"mediatek","product":"mt8173"},{"vendor":"mediatek","product":"mt8175"},{"vendor":"mediatek","product":"mt8185"},{"vendor":"mediatek","product":"mt8188"},{"vendor":"mediatek","product":"mt8195"},{"vendor":"mediatek","product":"mt8321"},{"vendor":"mediatek","product":"mt8362a"},{"vendor":"mediatek","product":"mt8365"},{"vendor":"mediatek","product":"mt8385"},{"vendor":"mediatek","product":"mt8395"},{"vendor":"mediatek","product":"mt8666"},{"vendor":"mediatek","product":"mt8673"},{"vendor":"mediatek","product":"mt8675"},{"vendor":"mediatek","product":"mt8765"},{"vendor":"mediatek","product":"mt8766"},{"vendor":"mediatek","product":"mt8768"},{"vendor":"mediatek","product":"mt8781"},{"vendor":"mediatek","product":"mt8786"},{"vendor":"mediatek","product":"mt8788"},{"vendor":"mediatek","product":"mt8789"},{"vendor":"mediatek","product":"mt8791"},{"vendor":"mediatek","product":"mt8791t"},{"vendor":"mediatek","product":"mt8797"},{"vendor":"mediatek, inc.","product":"mt2713, mt2735, mt6833, mt6835, mt6853, mt6855, mt6873, mt6875, mt6877, mt6879, mt6880, mt6883, mt6885, mt6886, mt6889, mt6890, mt6891, mt6893, mt6895, mt6980, mt6983, mt6985, mt6990, mt8167, mt8167s, mt8168, mt8173, mt8175, mt8185, mt8188, mt8195, mt8321, mt8362a, mt8365, mt8385, mt8395, mt8666, mt8673, mt8675, mt8765, mt8766, mt8768, mt8781, mt8786, mt8788, mt8789, mt8791, mt8791t, mt8797"},{"vendor":"openwrt","product":"openwrt"},{"vendor":"rdkcentral","product":"rdk-b"}],"references":[{"url":"https://corp.mediatek.com/product-security-bulletin/September-2023","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-20821"},{"url":"https://github.com/advisories/GHSA-9vcq-gvpp-5xgr"}],"sources":{"cve":[{"id":"CVE-2023-20821","description":"In nvram, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07937113; Issue ID: ALPS07937113.","status":"published","published":"2023-09-04T02:27:17.577Z","modified":"2024-10-10T17:06:16.142Z","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","assessor":"adp"}],"updated_at":"2026-11-02T14:35:13.368958Z"}],"euvd":[{"id":"EUVD-2023-25000","description":"In nvram, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07937113; Issue ID: ALPS07937113.","status":"published","published":"2023-09-04T02:27:17Z","modified":"2024-10-10T17:06:16Z","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"}],"updated_at":"2026-11-03T00:27:41.012246Z"}],"ghsa":[{"id":"GHSA-9vcq-gvpp-5xgr","title":"In nvram, there is a possible out of bounds write due to a missing bounds check. This could lead...","description":"In nvram, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07937113; Issue ID: ALPS07937113.","status":"published","published":"2023-09-04T03:30:19Z","modified":"2024-04-04T07:24:19Z","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-787"],"updated_at":"2026-11-02T14:56:50.902062Z"}],"nvd":[{"id":"CVE-2023-20821","description":"In nvram, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07937113; Issue ID: ALPS07937113.","status":"published","published":"2023-09-04T03:15:08.48Z","modified":"2026-06-17T05:30:56.09Z","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","assessor":"primary"},{"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","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:08:27.181588Z"}]}}