VulnTideExploited vulnerabilities, by vendor. Data as of 28 Oct 2026.
Known exploitedIn CISA's KEV catalog since 8 September 2022Ransomware use: unknown
NETGEAR Multiple Devices

CVE-2017-5521: NETGEAR Multiple Devices Exposure of Sensitive Information Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 8 Sep 2022, 2,060 days after the CVE record was published.

How likely is exploitation in the next 30 days?
89.4%

EPSS score, percentile 99.8 of all scored records

How severe?
8.1 High

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

CISA deadline 29 Sep 2022. Apply updates per vendor instructions. Full text

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Not stated. The CVE record gives vendor and product as “n/a” and the version as “unspecified”.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

Required action, set by CISA

Apply updates per vendor instructions. If the affected device has since entered end-of-life, it should be disconnected if still in use.

CISA due date for this action: 29 September 2022.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

Affected products and versions

The CVE record does not name affected products or versions: vendor and product are “n/a” and the version is “unspecified”.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Multiple NETGEAR devices are prone to admin password disclosure via simple crafted requests to the web management server.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

  • CISA added CVE-2017-5521 to its Known Exploited Vulnerabilities (KEV) catalog on 8 Sep 2022.
  • CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
  • The due date CISA sets for the required action is 29 Sep 2022.
  • The CVE record was published on 17 Jan 2017, 2,060 days before it was added to KEV.
  • The CVE record carries a CVSS v3.1 base score of 8.1 (High), taken from CISA's enrichment of the record.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 89.4% (percentile 99.8), as of 28 Oct 2026.
  • CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

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.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

DateEvent
17 Jan 2017CVE record published
8 Sep 2022Added to CISA KEV
29 Sep 2022CISA due date for the required action
21 Oct 2025CVE record last updated

References

More exploited NETGEAR vulnerabilities

  • CVE-2017-6862: NETGEAR Multiple Devices Buffer Overflow Vulnerability (added 8 Jun 2022)
  • CVE-2016-10174: NETGEAR WNR2000v5 Router Buffer Overflow Vulnerability (added 25 Mar 2022)
  • CVE-2016-1555: NETGEAR Multiple WAP Devices Command Injection Vulnerability (added 25 Mar 2022)
  • CVE-2017-6334: NETGEAR DGN2200 Devices OS Command Injection Vulnerability (added 25 Mar 2022)
  • CVE-2016-6277: NETGEAR Multiple Routers Remote Code Execution Vulnerability (added 7 Mar 2022)
  • CVE-2017-6077: NETGEAR DGN2200 Remote Code Execution Vulnerability (added 7 Mar 2022)