CVE-2021-45644: Certain NETGEAR devices are affected by incorrect configuration of security settings

Q: How do I fix CVE-2021-45644?

ac2100 firmware: upgrade to 1.2.0.88; ac2400 firmware: upgrade to 1.2.0.88; ac2600 firmware: upgrade to 1.2.0.88. Exact commands for each OS are on this page.

Q: Is CVE-2021-45644 being exploited?

CVE-2021-45644 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-2021-45644 affect?

CVE-2021-45644 affects ac2100 firmware, ac2400 firmware, ac2600 firmware. Severity is medium (CVSS 6.8). Certain NETGEAR devices are affected by incorrect configuration of security settings. This affects AC2100 before 1.2.0.88, AC2400 before 1.2.0.88, AC2600 before 1.2.0.88, R6220 before 1.1.0.110, R6230 before 1.1.0.110, R6260 before 1.1.0.84

Q: How urgent is CVE-2021-45644?

Priority 40/100. No elevated risk signals yet.

This month

MEDIUM 6.8UPGRADEUPGRADEUPGRADE

CVE-2021-45644 is a medium-severity flaw (CVSS 6.8) affecting ac2100 firmware, ac2400 firmware, ac2600 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 incorrect configuration of security settings. This affects AC2100 before 1.2.0.88, AC2400 before 1.2.0.88, AC2600 before 1.2.0.88, R6220 before 1.1.0.110, R6230 before 1.1.0.110, R6260 before 1.1.0.84, R6330 before 1.1.0.84, R6350 before 1.1.0.84, R6700v2 before 1.2.0.88, R6800 before 1.2.0.88, R6850 before 1.1.0.84, R6900v2 before 1.2.0.88, R7200 before 1.2.0.88, R7350 before 1.2.0.88, R7400 before 1.2.0.8

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
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 ac2100 firmware UPGRADE

Affected: < 1.2.0.88

Fixed in: 1.2.0.88

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 ac2400 firmware UPGRADE

Affected: < 1.2.0.88

Fixed in: 1.2.0.88

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 ac2600 firmware UPGRADE

Affected: < 1.2.0.88

Fixed in: 1.2.0.88

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 r6220 firmware UPGRADE

Affected: < 1.1.0.110

Fixed in: 1.1.0.110

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 r6230 firmware UPGRADE

Affected: < 1.1.0.110

Fixed in: 1.1.0.110

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 r6260 firmware UPGRADE

Affected: < 1.1.0.84

Fixed in: 1.1.0.84

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-2021-45644?

ac2100 firmware: upgrade to 1.2.0.88; ac2400 firmware: upgrade to 1.2.0.88; ac2600 firmware: upgrade to 1.2.0.88. Exact commands for each OS are on this page.

Is CVE-2021-45644 being exploited?

CVE-2021-45644 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-2021-45644 affect?

CVE-2021-45644 affects ac2100 firmware, ac2400 firmware, ac2600 firmware. Severity is medium (CVSS 6.8). Certain NETGEAR devices are affected by incorrect configuration of security settings. This affects AC2100 before 1.2.0.88, AC2400 before 1.2.0.88, AC2600 before 1.2.0.88, R6220 before 1.1.0.110, R6230 before 1.1.0.110, R6260 before 1.1.0.84

How urgent is CVE-2021-45644?

Priority 40/100. No elevated risk signals yet.

Software pages

Netgear vulnerabilities

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References

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