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CVE-2018-21167· NVD / CVE Program· CNA mitre

Certain NETGEAR devices are affected by stored XSS.

Certain NETGEAR devices are affected by stored XSS. This affects D6100 before 1.0.0.57, DM200 before 1.0.0.50, EX2700 before 1.0.1.32, EX6100v2 before 1.0.1.70, EX6150v2 before 1.0.1.70, EX6200v2 before 1.0.1.62, EX6400 before 1.0.1.78, EX7300 before 1.0.1.78, EX8000 before 1.0.0.114, R6100 before 1.0.1.22, R7500 before 1.0.0.122, R7800 before 1.0.2.42, R8900 before 1.0.3.10, R9000 before 1.0.3.10, WN2000RPTv3 before 1.0.1.26, WN3000RPv3 before 1.0.2.66, WN3100RPv2 before 1.0.0.42, WNDR3700v4 before 1.0.2.96, WNDR4300 before 1.0.2.98, WNDR4300v2 before 1.0.0.54, WNDR4500v3 before 1.0.0.54, and WNR2000v5 before 1.0.0.64.

MediumCVSS 5.5 · v3.1—No exploit No fix recorded
Published
Apr 27, 2020
Updated
Jun 16, 2026
EPSS
0.8% · 55th percentile
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Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

CNA vs NVD score

NVD
5.5
CNA · mitre
4.8
0.7 point gap

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
netgeard6100 firmware
netgeard6100
netgeardm200 firmware
netgeardm200
netgearex2700 firmware
netgearex2700
netgearex6100 firmware
netgearex6100
netgearex6150 firmware
netgearex6150
netgearex6200 firmware
netgearex6200

and 30 more

Affected versions

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

  • netgear d6100 firmwarebefore 1.0.0.57
  • netgear dm200 firmwarebefore 1.0.0.50
  • netgear ex2700 firmwarebefore 1.0.1.32
  • netgear ex6100 firmwarebefore 1.0.1.70
  • netgear ex6150 firmwarebefore 1.0.1.70
  • netgear ex6200 firmwarebefore 1.0.1.62
  • netgear ex6400 firmwarebefore 1.0.1.78
  • netgear ex7300 firmwarebefore 1.0.1.78
  • netgear ex8000 firmwarebefore 1.0.0.114
  • netgear r6100 firmwarebefore 1.0.1.22
  • netgear r7500 firmwarebefore 1.0.0.122
  • netgear r7800 firmwarebefore 1.0.2.42
  • netgear r8900 firmwarebefore 1.0.3.10
  • netgear r9000 firmwarebefore 1.0.3.10
  • netgear wn2000rpt firmwarebefore 1.0.1.26
  • netgear wn3000rp firmwarebefore 1.0.2.66
  • netgear wn3100rp firmwarebefore 1.0.0.42
  • netgear wndr3700 firmwarebefore 1.0.2.96
  • netgear wndr4300 firmwarebefore 1.0.2.98
  • netgear wndr4300 firmwarebefore 1.0.0.54

Same product

netgear: all records

Other highest-scoring records for the same primary product.

  • CVE-2016-10174The NETGEAR WNR2000v5 router contains a buffer overflow in the hidden_lang_avi parameter when invoking the URL /apply.cgi?/lang_check.html.KEV
    94Now
  • CVE-2017-18764Certain NETGEAR devices are affected by command injection by an unauthenticated attacker.
    36Monitor
  • CVE-2018-21208Certain NETGEAR devices are affected by command injection by an unauthenticated attacker.
    35Monitor
  • CVE-2018-21113Certain NETGEAR devices are affected by command injection by an unauthenticated attacker.
    35Monitor
  • CVE-2017-18776Certain NETGEAR devices are affected by authentication bypass.
    33Monitor
  • CVE-2017-18792NETGEAR D6100 devices before 1.0.0.50_0.0.50 are affected by command injection.
    33Monitor

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.

Credits

All researchers

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

  • Anyone who can reach it over the internet 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
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS vector

CVSS:3.1/AV:N/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.

The bug in code

The whole CWE-79 class

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;

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

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.

All records