--- id: "CVE-2017-5521" kind: "vulnerability" aliases: ["CVE-2017-5521"] title: "An issue was discovered on NETGEAR R8500, R8300, R7000, R6400, R7300, R7100LG, R6300v2, WNDR3400v3, WNR3500Lv2,\u2026" severity: "high" cvss: 8.1 epss: 0.89353 exploited: true status: "open" category: "infrastructure" products: [{"name": "NETGEAR Multiple Devices", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "netgear r6200 firmware", "fixed": [], "affected": "= 1.0.1.56_1.0.43", "ecosystem": "vendor"}, {"name": "netgear r6300 firmware", "fixed": [], "affected": "= 1.0.2.78_1.0.58", "ecosystem": "vendor"}, {"name": "netgear vegn2610 firmware", "fixed": [], "affected": "= 1.0.0.36", "ecosystem": "vendor"}, {"name": "netgear ac1450 firmware", "fixed": [], "affected": "= 1.0.0.34_10.0.16", "ecosystem": "vendor"}, {"name": "netgear wnr1000v3 firmware", "fixed": [], "affected": "= 1.0.2.68_60.0.93", "ecosystem": "vendor"}, {"name": "netgear wndr3700v3 firmware", "fixed": [], "affected": "= 1.0.0.40_1.0.32", "ecosystem": "vendor"}, {"name": "netgear wndr4000 firmware", "fixed": [], "affected": "= 1.0.2.4_9.1.86", "ecosystem": "vendor"}, {"name": "netgear wndr4500 firmware", "fixed": [], "affected": "= 1.0.1.44_1.0.73", "ecosystem": "vendor"}, {"name": "netgear d6400 firmware", "fixed": [], "affected": "= 1.0.0.44", "ecosystem": "vendor"}, {"name": "netgear d6220 firmware", "fixed": [], "affected": "= 1.0.0.12", "ecosystem": "vendor"}, {"name": "netgear d6300 firmware", "fixed": [], "affected": "= 1.0.0.96", "ecosystem": "vendor"}, {"name": "netgear d6300b firmware", "fixed": [], "affected": "= 1.0.0.40", "ecosystem": "vendor"}, {"name": "netgear dgn2200bv4 firmware", "fixed": [], "affected": "= 1.0.0.68", "ecosystem": "vendor"}] ecosystems: ["vendor"] tags: ["exploited", "home-network", "infrastructure", "netgear", "routers", "self-hosted"] not_affected_if: ["unknown"] published_at: "2017-01-17T09:59:00+00:00" first_seen_at: "2026-10-23T19:11:52+00:00" updated_at: "2026-10-23T22:29:04+00:00" sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2017-5521", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2017-5521", "first_seen_at": "2026-10-23T19:13:45+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-5521", "first_seen_at": "2026-10-23T22:29:04+00:00"}] --- # An issue was discovered on NETGEAR R8500, R8300, R7000, R6400, R7300, R7100LG, R6300v2, WNDR3400v3, WNR3500Lv2,… Multiple NETGEAR consumer routers and network devices leak the admin password through crafted requests to their web management server. An attacker who can reach the web interface can read the admin password and take control of the device. _Summary, check and fix written by a model from the sources; labelled as such._ ## Affected - vendor:NETGEAR Multiple Devices affected ? fixed ? - vendor:netgear r6200 firmware affected = 1.0.1.56_1.0.43 fixed ? - vendor:netgear r6300 firmware affected = 1.0.2.78_1.0.58 fixed ? - vendor:netgear vegn2610 firmware affected = 1.0.0.36 fixed ? - vendor:netgear ac1450 firmware affected = 1.0.0.34_10.0.16 fixed ? - vendor:netgear wnr1000v3 firmware affected = 1.0.2.68_60.0.93 fixed ? - vendor:netgear wndr3700v3 firmware affected = 1.0.0.40_1.0.32 fixed ? - vendor:netgear wndr4000 firmware affected = 1.0.2.4_9.1.86 fixed ? - vendor:netgear wndr4500 firmware affected = 1.0.1.44_1.0.73 fixed ? - vendor:netgear d6400 firmware affected = 1.0.0.44 fixed ? - vendor:netgear d6220 firmware affected = 1.0.0.12 fixed ? - vendor:netgear d6300 firmware affected = 1.0.0.96 fixed ? - vendor:netgear d6300b firmware affected = 1.0.0.40 fixed ? - vendor:netgear dgn2200bv4 firmware affected = 1.0.0.68 fixed ? ## How to check Check the device model and firmware version against the NETGEAR advisory for CVE-2017-5521 (unknown which models and versions from sources). Confirm whether the web management interface is reachable from the internet. ## Fix Apply the vendor firmware update per NETGEAR instructions; unknown which version is fixed. If the device is end-of-life, replace or disconnect it, and change the admin password. ## Timeline - 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2017-5521 - 2026-10-23T19:13:45+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2017-5521 - 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2017-5521 ## From the sources An issue was discovered on NETGEAR R8500, R8300, R7000, R6400, R7300, R7100LG, R6300v2, WNDR3400v3, WNR3500Lv2, R6250, R6700, R6900, and R8000 devices. They are prone to password disclosure via simple crafted requests to the web management server. The bug is exploitable remotely if the remote management option is set, and can also be exploited given access to the router over LAN or WLAN. When trying to access the web panel, a user is asked to authenticate; if the authentication is canceled and password recovery is not enabled, the user is redirected to a page that exposes a password recovery token. If a user supplies the correct token to the page /passwordrecovered.cgi?id=TOKEN (and password recovery is not enabled), they will receive the admin password for the router. If password recovery is set the exploit will fail, as it will ask the user for the recovery questions that were previously set when enabling that feature. This is persistent (even after disabling the recovery option, the exploit will fail) because the router will ask for the security questions. --- _Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_