{"id":"CVE-2021-21724","aliases":["EUVD-2021-8896","GHSA-fqjw-rgv6-j77q"],"status":"published","title":"A ZTE product has a memory leak vulnerability. Due to the product's improper handling of memory...","description":"A ZTE product has a memory leak vulnerability. Due to the product's improper handling of memory release in certain scenarios, a local attacker with device permissions repeatedly attenuated the optical signal to cause memory leak and abnormal service. This affects: ZXR10 8900E, all versions up to V3.03.20R2B30P1.","severity":{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00367,"percentile":0.31014,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-401"],"published":"2021-02-26T02:37:07Z","modified":"2026-06-17T03:36:02Z","products":[{"vendor":"zte","product":"zxr10_8900e_firmware"}],"references":[{"url":"http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014584","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21724"},{"url":"https://github.com/advisories/GHSA-fqjw-rgv6-j77q"}],"sources":{"cve":[{"id":"CVE-2021-21724","description":"A ZTE product has a memory leak vulnerability. Due to the product's improper handling of memory release in certain scenarios, a local attacker with device permissions repeatedly attenuated the optical signal to cause memory leak and abnormal service. This affects: ZXR10 8900E, all versions up to V3.03.20R2B30P1.","status":"published","published":"2021-02-26T02:37:07Z","modified":"2024-08-03T18:23:28.65Z","updated_at":"2026-11-02T14:33:00.137099Z"}],"euvd":[{"id":"EUVD-2021-8896","description":"A ZTE product has a memory leak vulnerability. Due to the product's improper handling of memory release in certain scenarios, a local attacker with device permissions repeatedly attenuated the optical signal to cause memory leak and abnormal service. This affects: ZXR10 8900E, all versions up to V3.03.20R2B30P1.","status":"published","published":"2021-02-26T02:37:07Z","modified":"2024-08-03T18:23:28Z","updated_at":"2026-11-03T03:25:05.131984Z"}],"ghsa":[{"id":"GHSA-fqjw-rgv6-j77q","title":"A ZTE product has a memory leak vulnerability. Due to the product's improper handling of memory...","description":"A ZTE product has a memory leak vulnerability. Due to the product's improper handling of memory release in certain scenarios, a local attacker with device permissions repeatedly attenuated the optical signal to cause memory leak and abnormal service. This affects: ZXR10 8900E, all versions up to V3.03.20R2B30P1.","status":"published","published":"2022-05-24T17:43:11Z","modified":"2023-01-29T05:05:31Z","cwes":["CWE-401"],"updated_at":"2026-11-02T14:45:48.864861Z"}],"nvd":[{"id":"CVE-2021-21724","description":"A ZTE product has a memory leak vulnerability. Due to the product's improper handling of memory release in certain scenarios, a local attacker with device permissions repeatedly attenuated the optical signal to cause memory leak and abnormal service. This affects: ZXR10 8900E, all versions up to V3.03.20R2B30P1.","status":"published","published":"2021-02-26T03:15:12.963Z","modified":"2026-06-17T03:36:02.63Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"cwes":["CWE-401"],"updated_at":"2026-11-02T14:06:50.399901Z"}]}}