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CVE-2022-27643: This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NE

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This week
HIGH 8.8UPGRADEUPGRADEUPGRADE

CVE-2022-27643 is a high-severity flaw (CVSS 8.8) affecting r6400 firmware, r6700 firmware, r6900p firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6700v3 1.0.4.120_10.0.91 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of SOAP requests. When parsing the SOAPAction header, the process does not properly validate the length of user-supplied data prior to copying it to a buffer. An attacker can leverage this vul

Why this priority

  • High severity
  • EPSS top 2%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score8.8 (High)
Attack vectorAdjacent network
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance25.2% (top 2%)
CISA exploited listNo
WeaknessCWE-120
Published2023-03-29
Last modified2026-06-17
Publisher (CNA): Zero Day Initiative · Vendor: netgear

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

Am I affected?

Timeline

netgear r6400 firmware UPGRADE
Affected: < 1.0.1.78 · < 1.0.4.126
Fixed in: 1.0.1.78, 1.0.4.126
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 r6700 firmware UPGRADE
Affected: < 1.0.4.126
Fixed in: 1.0.4.126
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 r6900p firmware UPGRADE
Affected: < 1.3.3.148
Fixed in: 1.3.3.148
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 r7000 firmware UPGRADE
Affected: < 1.0.11.134
Fixed in: 1.0.11.134
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 r7000p firmware UPGRADE
Affected: < 1.3.3.148
Fixed in: 1.3.3.148
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 r7850 firmware UPGRADE
Affected: < 1.0.5.84
Fixed in: 1.0.5.84
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-2022-27643?

r6400 firmware: upgrade to 1.0.1.78, 1.0.4.126; r6700 firmware: upgrade to 1.0.4.126; r6900p firmware: upgrade to 1.3.3.148. Exact commands for each OS are on this page.

Is CVE-2022-27643 being exploited?

CVE-2022-27643 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-2022-27643 affect?

CVE-2022-27643 affects r6400 firmware, r6700 firmware, r6900p firmware. Severity is high (CVSS 8.8). This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6700v3 1.0.4.120_10.0.91 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists wi

How urgent is CVE-2022-27643?

Priority 55/100. High severity; EPSS top 2%: very likely to be exploited

Software pages

Netgear vulnerabilities

Related CVEs

References

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