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CVE-2018-21209· NVD / CVE Program· CNA mitre

Certain NETGEAR devices are affected by reflected XSS.

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.

MediumCVSS 4.8 · v3.1—No exploit No fix recorded
Published
Apr 28, 2020
Updated
Jun 16, 2026
EPSS
0.7% · 50th percentile
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Action score

19

Monitor

Low priority for now.

CVSS
19 / 40 · 4.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.7%

CNA vs NVD score

NVD
4.8
CNA · mitre
4.8
agree

CVSS:3.0/AC:L/AV:A/A:N/C:L/I:L/PR:H/S:C/UI:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
netgearjnr1010 firmware
netgearjnr1010
netgearjr6150 firmware
netgearjr6150
netgearjwnr2010 firmware
netgearjwnr2010
netgearpr2000 firmware
netgearpr2000
netgearr6050 firmware
netgearr6050
netgearr6220 firmware
netgearr6220

and 8 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • netgear jnr1010 firmwarebefore 1.1.0.46
  • netgear jr6150 firmwarebefore 1.0.1.10
  • netgear jwnr2010 firmwarebefore 1.1.0.46
  • netgear pr2000 firmwarebefore 1.0.0.20
  • netgear r6050 firmwarebefore 1.0.1.10
  • netgear r6220 firmwarebefore 1.1.0.60
  • netgear wndr3700 firmwarebefore 1.1.0.50
  • netgear wnr1000 firmwarebefore 1.1.0.46
  • netgear wnr2020 firmwarebefore 1.1.0.46
  • netgear wnr2050 firmwarebefore 1.1.0.46

Other highest-scoring records for the same primary product.

  • CVE-2016-11014NETGEAR JNR1010 devices before 1.0.0.32 have Incorrect Access Control because the ok value of the auth cookie is a special case.
    40Plan
  • CVE-2017-18737Certain NETGEAR devices are affected by command injection by an unauthenticated attacker.
    36Monitor
  • CVE-2017-18734Certain NETGEAR devices are affected by command injection by an unauthenticated attacker.
    36Monitor
  • CVE-2018-21226Certain NETGEAR devices are affected by authentication bypass.
    35Monitor
  • CVE-2017-18749Certain NETGEAR devices are affected by CSRF.
    35Monitor
  • CVE-2016-11057Certain NETGEAR devices are affected by mishandling of repeated URL calls.
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Adjacent
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

nvd-primary

Root cause

User content is inserted into the page as HTML. The browser interprets the content as code rather than data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
commentEl.innerHTML = comment.body;

Fixed

ts
commentEl.textContent = comment.body;

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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