CVE-2021-45667: Certain NETGEAR devices are affected by stored XSS

Q: How do I fix CVE-2021-45667?

cbr40 firmware: upgrade to 2.5.0.10; eax20 firmware: upgrade to 1.0.0.48; eax80 firmware: upgrade to 1.0.1.64. Exact commands for each OS are on this page.

Q: Is CVE-2021-45667 being exploited?

CVE-2021-45667 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-45667 affect?

CVE-2021-45667 affects cbr40 firmware, eax20 firmware, eax80 firmware. Severity is medium (CVSS 6.5). Certain NETGEAR devices are affected by stored XSS. This affects CBR40 before 2.5.0.10, EAX20 before 1.0.0.48, EAX80 before 1.0.1.64, EX6120 before 1.0.0.64, EX6130 before 1.0.0.44, EX7500 before 1.0.0.72, R7960P before 1.4.1.66, RAX200 bef

Q: How urgent is CVE-2021-45667?

Priority 32/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADEUPGRADEUPGRADE

CVE-2021-45667 is a medium-severity flaw (CVSS 6.5) affecting cbr40 firmware, eax20 firmware, eax80 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Certain NETGEAR devices are affected by stored XSS. This affects CBR40 before 2.5.0.10, EAX20 before 1.0.0.48, EAX80 before 1.0.1.64, EX6120 before 1.0.0.64, EX6130 before 1.0.0.44, EX7500 before 1.0.0.72, R7960P before 1.4.1.66, RAX200 before 1.0.3.106, RBS40V before 2.6.1.4, RBW30 before 2.6.1.4, EX3700 before 1.0.0.90, MR60 before 1.0.6.110, R8000P before 1.4.1.66, RAX20 before 1.0.2.82, RAX45 before 1.0.2.72, RAX80 before 1.0.3.106, EX3800 be

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Adjacent network
Attack complexity	High
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-12-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: netgear

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-12-26 01:15 UTCPublished CVE record published
2026-06-17 04:13 UTCUpdated Record last modified

netgear cbr40 firmware UPGRADE

Affected: < 2.5.0.10

Fixed in: 2.5.0.10

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netgear eax20 firmware UPGRADE

Affected: < 1.0.0.48

Fixed in: 1.0.0.48

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netgear eax80 firmware UPGRADE

Affected: < 1.0.1.64

Fixed in: 1.0.1.64

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netgear ex6120 firmware UPGRADE

Affected: < 1.0.0.64

Fixed in: 1.0.0.64

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netgear ex6130 firmware UPGRADE

Affected: < 1.0.0.44

Fixed in: 1.0.0.44

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netgear ex7500 firmware UPGRADE

Affected: < 1.0.0.72

Fixed in: 1.0.0.72

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-45667?

cbr40 firmware: upgrade to 2.5.0.10; eax20 firmware: upgrade to 1.0.0.48; eax80 firmware: upgrade to 1.0.1.64. Exact commands for each OS are on this page.

Is CVE-2021-45667 being exploited?

CVE-2021-45667 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-45667 affect?

CVE-2021-45667 affects cbr40 firmware, eax20 firmware, eax80 firmware. Severity is medium (CVSS 6.5). Certain NETGEAR devices are affected by stored XSS. This affects CBR40 before 2.5.0.10, EAX20 before 1.0.0.48, EAX80 before 1.0.1.64, EX6120 before 1.0.0.64, EX6130 before 1.0.0.44, EX7500 before 1.0.0.72, R7960P before 1.4.1.66, RAX200 bef

How urgent is CVE-2021-45667?

Priority 32/100. No elevated risk signals yet.

Software pages

Netgear vulnerabilities

Related CVEs

CVE-2024-28340 HIGH 7.5 MITIGATE MITIGATE An information leak in the currentsetting.htm component of Netgear CBR40 2.5.0.28, Netgear CBK40 2.5.0.28, and
CVE-2024-28339 MEDIUM 5.4 MITIGATE MITIGATE An information leak in the debuginfo.htm component of Netgear CBR40 2.5.0.28, Netgear CBK40 2.5.0.28, and Netg
CVE-2023-36187 CRITICAL 9.8 UPGRADE UPGRADE Buffer Overflow vulnerability in NETGEAR R6400v2 before version 1.0.4.118, allows remote unauthenticated attac
CVE-2021-45639 MEDIUM 5.2 UPGRADE UPGRADE Certain NETGEAR devices are affected by reflected XSS
CVE-2021-45631 CRITICAL 9.6 UPGRADE UPGRADE Certain NETGEAR devices are affected by command injection by an unauthenticated attacker

References

← Back to latest CVEs