{"id":"CVE-2025-6599","aliases":["EUVD-2025-197903","GHSA-r99r-5wp8-8w99"],"status":"published","title":"An uncontrolled resource consumption vulnerability in the web server of Zyxel DX3301-T0 firmware...","description":"An uncontrolled resource consumption vulnerability in the web server of Zyxel DX3301-T0 firmware version 5.50(ABVY.6.3)C0 and earlier could allow an attacker to perform Slowloris‑style denial‑of‑service (DoS) attacks. Such attacks may temporarily block legitimate HTTP requests and partially disrupt access to the web management interface, while other networking services remain unaffected.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00335,"percentile":0.27025,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2025-11-18T01:19:47Z","modified":"2026-10-18T20:10:00Z","products":[{"vendor":"zyxel","product":"ax7501-b0_firmware"},{"vendor":"zyxel","product":"ax7501-b1_firmware"},{"vendor":"zyxel","product":"dm4200-b0_firmware"},{"vendor":"zyxel","product":"dx3300-t0_firmware"},{"vendor":"zyxel","product":"dx3300-t1_firmware"},{"vendor":"zyxel","product":"dx3301-t0 firmware"},{"vendor":"zyxel","product":"dx3301-t0_firmware"},{"vendor":"zyxel","product":"dx4510-b1_firmware"},{"vendor":"zyxel","product":"dx5401-b0_firmware"},{"vendor":"zyxel","product":"dx5401-b1_firmware"},{"vendor":"zyxel","product":"ee3301-00_firmware"},{"vendor":"zyxel","product":"ee5301-00_firmware"},{"vendor":"zyxel","product":"ee6510-10_firmware"},{"vendor":"zyxel","product":"emg3525-t50b_firmware"},{"vendor":"zyxel","product":"emg5523-t50b_firmware"},{"vendor":"zyxel","product":"emg5723-t50k_firmware"},{"vendor":"zyxel","product":"emg6726-b10a_firmware"},{"vendor":"zyxel","product":"ex3300-t0_firmware"},{"vendor":"zyxel","product":"ex3300-t1_firmware"},{"vendor":"zyxel","product":"ex3301-t0_firmware"},{"vendor":"zyxel","product":"ex3500-t0_firmware"},{"vendor":"zyxel","product":"ex3501-t0_firmware"},{"vendor":"zyxel","product":"ex3600-t0_firmware"},{"vendor":"zyxel","product":"ex5401-b0_firmware"},{"vendor":"zyxel","product":"ex5401-b1_firmware"},{"vendor":"zyxel","product":"ex5501-b0_firmware"},{"vendor":"zyxel","product":"ex5510-b0_firmware"},{"vendor":"zyxel","product":"ex5512-t0_firmware"},{"vendor":"zyxel","product":"ex5601-t0_firmware"},{"vendor":"zyxel","product":"ex5601-t1_firmware"},{"vendor":"zyxel","product":"ex7501-b0_firmware"},{"vendor":"zyxel","product":"ex7710-b0_firmware"},{"vendor":"zyxel","product":"gm4100-b0_firmware"},{"vendor":"zyxel","product":"lte3301-plus_firmware"},{"vendor":"zyxel","product":"nebula_fwa505_firmware"},{"vendor":"zyxel","product":"nebula_fwa510_firmware"},{"vendor":"zyxel","product":"nebula_fwa515_firmware"},{"vendor":"zyxel","product":"nebula_fwa710_firmware"},{"vendor":"zyxel","product":"nr5103_firmware"},{"vendor":"zyxel","product":"nr5103e_firmware"},{"vendor":"zyxel","product":"nr5309_firmware"},{"vendor":"zyxel","product":"nr7302_firmware"},{"vendor":"zyxel","product":"nr7303_firmware"},{"vendor":"zyxel","product":"pe3301-00_firmware"},{"vendor":"zyxel","product":"pe5301-01_firmware"},{"vendor":"zyxel","product":"pm3100-t0_firmware"},{"vendor":"zyxel","product":"pm5100-t0_firmware"},{"vendor":"zyxel","product":"pm7300-t0_firmware"},{"vendor":"zyxel","product":"pm7500-00_firmware"},{"vendor":"zyxel","product":"px3321-t1_firmware"},{"vendor":"zyxel","product":"px5301-t0_firmware"},{"vendor":"zyxel","product":"scr_50axe_firmware"},{"vendor":"zyxel","product":"vmg3625-t50b_firmware"},{"vendor":"zyxel","product":"vmg3927-b50b_firmware"},{"vendor":"zyxel","product":"vmg3927-t50k_firmware"},{"vendor":"zyxel","product":"vmg4005-b50a_firmware"},{"vendor":"zyxel","product":"vmg4005-b50b_firmware"},{"vendor":"zyxel","product":"vmg4005-b60a_firmware"},{"vendor":"zyxel","product":"vmg4927-b50a_firmware"},{"vendor":"zyxel","product":"vmg8623-t50b_firmware"},{"vendor":"zyxel","product":"vmg8825-t50k_firmware"},{"vendor":"zyxel","product":"we3300-00_firmware"},{"vendor":"zyxel","product":"wx3100-t0_firmware"},{"vendor":"zyxel","product":"wx3401-b0_firmware"},{"vendor":"zyxel","product":"wx3401-b1_firmware"},{"vendor":"zyxel","product":"wx5600-t0_firmware"},{"vendor":"zyxel","product":"wx5610-b0_firmware"}],"references":[{"url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-uncontrolled-resource-consumption-and-command-injection-vulnerabilities-in-certain-4g-lte-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-security-routers-and-wireless-extenders-11-18-2025","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-6599"},{"url":"https://github.com/advisories/GHSA-r99r-5wp8-8w99"}],"sources":{"cve":[{"id":"CVE-2025-6599","description":"An uncontrolled resource consumption vulnerability in the web server of Zyxel DX3301-T0 firmware version 5.50(ABVY.6.3)C0 and earlier could allow an attacker to perform Slowloris‑style denial‑of‑service (DoS) attacks. Such attacks may temporarily block legitimate HTTP requests and partially disrupt access to the web management interface, while other networking services remain unaffected.","status":"published","published":"2025-11-18T01:19:47.163Z","modified":"2025-11-18T16:35:31.932Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:32:40.774223Z"}],"euvd":[{"id":"EUVD-2025-197903","description":"An uncontrolled resource consumption vulnerability in the web server of Zyxel DX3301-T0 firmware version 5.50(ABVY.6.3)C0 and earlier could allow an attacker to perform Slowloris‑style denial‑of‑service (DoS) attacks. Such attacks may temporarily block legitimate HTTP requests and partially disrupt access to the web management interface, while other networking services remain unaffected.","status":"published","published":"2025-11-18T01:19:47Z","modified":"2025-11-18T16:35:31Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T19:49:15.806163Z"}],"ghsa":[{"id":"GHSA-r99r-5wp8-8w99","title":"An uncontrolled resource consumption vulnerability in the web server of Zyxel DX3301-T0 firmware...","description":"An uncontrolled resource consumption vulnerability in the web server of Zyxel DX3301-T0 firmware version 5.50(ABVY.6.3)C0 and earlier could allow an attacker to perform Slowloris‑style denial‑of‑service (DoS) attacks. 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Such attacks may temporarily block legitimate HTTP requests and partially disrupt access to the web management interface, while other networking services remain unaffected.","status":"published","published":"2025-11-18T02:15:45.21Z","modified":"2026-10-18T20:10:00.11Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:11:44.669367Z"}]}}