CVE-2021-37316: SQL injection vulnerability in Cloud Disk in ASUS RT-AC68U router firmware version before 3.0.0.4.386.41634 al

Q: How do I fix CVE-2021-37316?

rt-ac68u firmware: upgrade to 3.0.0.4.386.41634. Exact commands for each OS are on this page.

Q: Is CVE-2021-37316 being exploited?

CVE-2021-37316 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-2021-37316 affect?

CVE-2021-37316 affects rt-ac68u firmware. Severity is high (CVSS 7.5). SQL injection vulnerability in Cloud Disk in ASUS RT-AC68U router firmware version before 3.0.0.4.386.41634 allows remote attackers to view sensitive information via /etc/shadow.

Q: How urgent is CVE-2021-37316?

Priority 52/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2021-37316 is a high-severity flaw (CVSS 7.5) affecting rt-ac68u firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SQL injection vulnerability in Cloud Disk in ASUS RT-AC68U router firmware version before 3.0.0.4.386.41634 allows remote attackers to view sensitive information via /etc/shadow.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-89
Published	2023-02-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: asus

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

Am I affected?

Timeline

2023-02-03 18:15 UTCPublished CVE record published
2026-06-17 04:00 UTCUpdated Record last modified

asus rt-ac68u firmware UPGRADE

Affected: < 3.0.0.4.386.41634

Fixed in: 3.0.0.4.386.41634

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-2021-37316?

rt-ac68u firmware: upgrade to 3.0.0.4.386.41634. Exact commands for each OS are on this page.

Is CVE-2021-37316 being exploited?

CVE-2021-37316 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-2021-37316 affect?

CVE-2021-37316 affects rt-ac68u firmware. Severity is high (CVSS 7.5). SQL injection vulnerability in Cloud Disk in ASUS RT-AC68U router firmware version before 3.0.0.4.386.41634 allows remote attackers to view sensitive information via /etc/shadow.

How urgent is CVE-2021-37316?

Priority 52/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

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References

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