CVE-2022-26376: A memory corruption vulnerability exists in the httpd unescape functionality of Asuswrt prior to 3.0.0.4.386_4
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CRITICAL 9.8REMOTEUPGRADEUPGRADEUPGRADE
CVE-2022-26376 is a critical-severity flaw (CVSS 9.8) affecting asuswrt, new gen, xt8 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A memory corruption vulnerability exists in the httpd unescape functionality of Asuswrt prior to 3.0.0.4.386_48706 and Asuswrt-Merlin New Gen prior to 386.7.. A specially-crafted HTTP request can lead to memory corruption. An attacker can send a network request to trigger this vulnerability.
Last updated 2026-06-17 · 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
asus asuswrt UPGRADE
Affected: < 3.0.0.4.386_48706
Fixed in: 3.0.0.4.386_48706
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.
asuswrt-merlin new gen UPGRADE
Affected: < 386.7
Fixed in: 386.7
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.
asus xt8 firmware UPGRADE
Affected: < 3.0.0.4.386_48706
Fixed in: 3.0.0.4.386_48706
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.
asus tuf-ax3000 v2 firmware UPGRADE
Affected: < 3.0.0.4.386_48750
Fixed in: 3.0.0.4.386_48750
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.
asus xd4 firmware UPGRADE
Affected: < 3.0.0.4.386_48790
Fixed in: 3.0.0.4.386_48790
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.
asus et12 firmware UPGRADE
Affected: < 3.0.0.4.386_48823
Fixed in: 3.0.0.4.386_48823
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-2022-26376?
asuswrt: upgrade to 3.0.0.4.386_48706; new gen: upgrade to 386.7; xt8 firmware: upgrade to 3.0.0.4.386_48706. Exact commands for each OS are on this page.
Is CVE-2022-26376 being exploited?
CVE-2022-26376 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-2022-26376 affect?
CVE-2022-26376 affects asuswrt, new gen, xt8 firmware. Severity is critical (CVSS 9.8). A memory corruption vulnerability exists in the httpd unescape functionality of Asuswrt prior to 3.0.0.4.386_48706 and Asuswrt-Merlin New Gen prior to 386.7.. A specially-crafted HTTP request can lead to memory corruption. An attacker can s
How urgent is CVE-2022-26376?
Priority 63/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action
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