CVE-2026-0641: A security vulnerability has been detected in TOTOLINK WA300 5.2cu.7112_B20190227

This month

MEDIUM 6.3MITIGATE

CVE-2026-0641 is a medium-severity flaw (CVSS 6.3) affecting wa300 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A security vulnerability has been detected in TOTOLINK WA300 5.2cu.7112_B20190227. This vulnerability affects the function sub_401510 of the file cstecgi.cgi. The manipulation of the argument UPLOAD_FILENAME leads to command injection. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	2.6% (top 14%)
CISA exploited list	No
Weakness	CWE-74, CWE-77
Published	2026-01-06
Last modified	2026-10-26

Publisher (CNA): VulDB · Vendor: totolink

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-06 19:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

totolink wa300 firmware MITIGATE

Affected: 5.2cu.7112_b20190227

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.2cu.7112_b20190227

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-2026-0641?

wa300 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-0641 being exploited?

CVE-2026-0641 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-2026-0641 affect?

CVE-2026-0641 affects wa300 firmware. Severity is medium (CVSS 6.3). A security vulnerability has been detected in TOTOLINK WA300 5.2cu.7112_B20190227. This vulnerability affects the function sub_401510 of the file cstecgi.cgi. The manipulation of the argument UPLOAD_FILENAME leads to command injection. The

How urgent is CVE-2026-0641?

Priority 48/100. Public exploit reference

References

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