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Vulnerabilities

Vulnerability · CVE-2025-52089

TOTOLINK n300rb_firmware Missing Authentication for Critical Function

Published Mar 11, 2026 · catalog updated Mar 11, 2026 · TOTOLINK

Patch now

CVE-2025-52089 is in the CISA known-exploited catalog. Confirm TOTOLINK against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
9.69%
Remediation
Remediation guidance
Affected products
vendor TOTOLINK n300rb_firmware

A hidden remote support feature protected by a static secret in TOTOLINK N300RB firmware version 8.54 allows an authenticated attacker to execute arbitrary OS commands with root privileges.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor TOTOLINK n300rb_firmwareversion unspecified

How to fix CVE-2025-52089

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-52089 is in the CISA known-exploited catalog. Confirm TOTOLINK against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 9.69%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 11, 2026 · VulnCheck KEV

    Detected

    A hidden remote support feature protected by a static secret in TOTOLINK N300RB firmware version 8.54 allows an authenticated attacker to execute arbitrary OS commands with root privileges.

  2. Mar 11, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2025-52089

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-52089

    30-day exploitation probability 9.7%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2025-52089

    A hidden remote support feature protected by a static secret in TOTOLINK N300RB firmware version 8.54 allows an authenticated attacker to execute arbitrary OS commands with root privileges.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.