CVE-2018-21209

Certain NETGEAR devices are affected by reflected XSS. This affects JNR1010v2 before 1.1.0.46, JR6150 before 1.0.1.10, JWNR2010v5 before 1.1.0.46, PR2000 before 1.0.0.20, R6050 before 1.0.1.10, R6220 before 1.1.0.60, WNDR3700v5 before 1.1.0.50, WNR1000v4 before 1.1.0.46, WNR2020 before 1.1.0.46, and WNR2050 before 1.1.0.46.

Published: 2020-04-28 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-21209 is rated Low Risk (35.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.66%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-21209

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.26% 0.66% +0.40%
2 2025-03-19 0.20% 0.26% +0.06%
3 2025-03-17 — 0.20% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-21209

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.8 3.1 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 1.7 2.7 [email protected]
4.8 3.0 MEDIUM
CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 1.7 2.7 [email protected]
3.5 2.0 LOW
AV:N/AC:M/Au:S/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 6.8 2.9 [email protected]

Weakness enumeration for CVE-2018-21209

Affected software / configurations for CVE-2018-21209

Vendor Product Version Raw CPE
netgear jnr1010_firmware < 1.1.0.46 cpe:2.3:o:netgear:jnr1010_firmware:*:*:*:*:*:*:*:*
netgear jr6150_firmware < 1.0.1.10 cpe:2.3:o:netgear:jr6150_firmware:*:*:*:*:*:*:*:*
netgear jwnr2010_firmware < 1.1.0.46 cpe:2.3:o:netgear:jwnr2010_firmware:*:*:*:*:*:*:*:*
netgear pr2000_firmware < 1.0.0.20 cpe:2.3:o:netgear:pr2000_firmware:*:*:*:*:*:*:*:*
netgear r6050_firmware < 1.0.1.10 cpe:2.3:o:netgear:r6050_firmware:*:*:*:*:*:*:*:*
netgear r6220_firmware < 1.1.0.60 cpe:2.3:o:netgear:r6220_firmware:*:*:*:*:*:*:*:*
netgear wndr3700_firmware < 1.1.0.50 cpe:2.3:o:netgear:wndr3700_firmware:*:*:*:*:*:*:*:*
netgear wnr1000_firmware < 1.1.0.46 cpe:2.3:o:netgear:wnr1000_firmware:*:*:*:*:*:*:*:*
netgear wnr2020_firmware < 1.1.0.46 cpe:2.3:o:netgear:wnr2020_firmware:*:*:*:*:*:*:*:*
netgear wnr2050_firmware < 1.1.0.46 cpe:2.3:o:netgear:wnr2050_firmware:*:*:*:*:*:*:*:*

References for CVE-2018-21209

cvelogic Threat Intelligence