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Netgear CVE-2017-5521

HIGH
2017-01-17 cve@mitre.org
8.1
CVSS 3.1 · NVD
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Vulnerability Assessment

Impact

CVSS score of 8.1 (HIGH). Attack characteristics: network attack vector, high complexity, no privileges required, no user interaction not required. CISA has confirmed active exploitation in the wild. Public proof-of-concept exploit code is available. EPSS exploitation probability: 93.80%.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

Act Now Prioritize within 24-48h. Why: HIGH severity + EPSS > 10%.
Exploited in the wild (CISA KEV) No patch listed yet 93.8% exploitation probability (EPSS)

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AnalysisAI

An issue was discovered on NETGEAR R8500, R8300, R7000, R6400, R7300, R7100LG, R6300v2, WNDR3400v3, WNR3500Lv2, R6250, R6700, R6900, and R8000 devices. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. Actively exploited in the wild (cisa kev) and public exploit code available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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Technical ContextAI · show details

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. Affected products include: Netgear R6200 Firmware, Netgear R6300 Firmware, Netgear Vegn2610 Firmware, Netgear Ac1450 Firmware, Netgear Wnr1000V3 Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.1 HIGH
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Added to CISA KEV
Apr 21, 2026 - 15:31 CISA
CVE Published
Jan 17, 2017 - 09:59 cve.org
HIGH 8.1

DescriptionCVE.org

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.

Threat Intelligence Overview

Threat Score
7.4/10
Composite threat intelligence
EPSS Score
93.8%
Top 0% exploitable
Exploit
POC
Public exploit code exists
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV Yes
Public POC Yes
EPSS 93.8%
Patch available No
Active threat Yes
Deciding rule
HIGH severity + EPSS > 10%
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Out-of-Cycle
Exploitation· derived
Active
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
High

Priority Score

204
Low Medium High Critical
KEV: +50
EPSS: +94
CVSS: +40
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:o:netgear:r6200_firmware:1.0.1.56_1.0.43:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r6300_firmware:1.0.2.78_1.0.58:*:*:*:*:*:*:*
cpe:2.3:o:netgear:vegn2610_firmware:1.0.0.36:*:*:*:*:*:*:*
cpe:2.3:o:netgear:ac1450_firmware:1.0.0.34_10.0.16:*:*:*:*:*:*:*
cpe:2.3:o:netgear:wnr1000v3_firmware:1.0.2.68_60.0.93:*:*:*:*:*:*:*
cpe:2.3:o:netgear:wndr3700v3_firmware:1.0.0.40_1.0.32:*:*:*:*:*:*:*
cpe:2.3:o:netgear:wndr4000_firmware:1.0.2.4_9.1.86:*:*:*:*:*:*:*
cpe:2.3:o:netgear:wndr4500_firmware:1.0.1.44_1.0.73:*:*:*:*:*:*:*
cpe:2.3:o:netgear:d6400_firmware:1.0.0.44:*:*:*:*:*:*:*
cpe:2.3:o:netgear:d6220_firmware:1.0.0.12:*:*:*:*:*:*:*
cpe:2.3:o:netgear:d6300_firmware:1.0.0.96:*:*:*:*:*:*:*
cpe:2.3:o:netgear:d6300b_firmware:1.0.0.40:*:*:*:*:*:*:*
cpe:2.3:o:netgear:dgn2200bv4_firmware:1.0.0.68:*:*:*:*:*:*:*
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