CVE-2026-32678: Authentication bypass issue exists in BUFFALO Wi-Fi router products, which may allow an attacker to alter crit
39
Routine
HIGH 7.5REMOTEMITIGATEUPGRADEUPGRADE
CVE-2026-32678 is a high-severity flaw (CVSS 7.5) affecting wzr-s900dhp firmware, wcr-1166dhpl firmware, wsr3600be4-kh firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Authentication bypass issue exists in BUFFALO Wi-Fi router products, which may allow an attacker to alter critical configuration settings without authentication.
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
Published CVE record published
Updated Record last modified
buffalo wzr-s900dhp firmware MITIGATE
Affected: all versions
Fixed in: no fixed release known
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.
buffalo wcr-1166dhpl firmware UPGRADE
Affected: < 1.01
Fixed in: 1.01
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.
buffalo wsr3600be4-kh firmware UPGRADE
Affected: < 6.02
Fixed in: 6.02
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.
buffalo wsr3600be4p firmware UPGRADE
Affected: < 5.02
Fixed in: 5.02
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.
buffalo wxr-1750dhp firmware UPGRADE
Affected: < 2.63
Fixed in: 2.63
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.
buffalo wxr-1750dhp2 firmware UPGRADE
Affected: < 2.63
Fixed in: 2.63
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 sourceNVD · 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-2026-32678?
wzr-s900dhp firmware: mitigate or apply the listed mitigation; wcr-1166dhpl firmware: upgrade to 1.01; wsr3600be4-kh firmware: upgrade to 6.02. Exact commands for each OS are on this page.
Is CVE-2026-32678 being exploited?
CVE-2026-32678 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-2026-32678 affect?
CVE-2026-32678 affects wzr-s900dhp firmware, wcr-1166dhpl firmware, wsr3600be4-kh firmware. Severity is high (CVSS 7.5). Authentication bypass issue exists in BUFFALO Wi-Fi router products, which may allow an attacker to alter critical configuration settings without authentication.
How urgent is CVE-2026-32678?
Priority 39/100. High severity; Remotely exploitable, no login, no user action
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