CVE-2026-7633Public exploitNetwork attack vector

Arbitrary file deletion via unchecked FileName path

Published May 2, 2026 · Updated May 2, 2026

External path control in TOTOLINK N300RH Firmware 6.1c.1353_B20190305 allows remote attackers to delete arbitrary device files. The setUploadSetting handler in upgrade.so reads FileName with websGetVar() and passes it to unlink() without validation or path restrictions. No authentication or user interaction is required, and the root-running web service permits deletion of critical device files.

CVSS severity6.5
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

External path control in TOTOLINK N300RH Firmware 6.1c.1353_B20190305 allows remote attackers to delete arbitrary device files. The setUploadSetting handler in upgrade.so reads FileName with websGetVar() and passes it to unlink() without validation or path restrictions. No authentication or user interaction is required, and the root-running web service permits deletion of critical device files.

The record

CVE
CVE-2026-7633
Published
May 2, 2026
Updated
May 2, 2026
Vendor
TOTOLINK
Product
N300RH Firmware
Classifications
CWE-73, T1485
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 2, 2026CVE publishedPublication date reported by the CVE source.
  2. May 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.1c.1353_B20190305

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TOTOLINK · N300RH Firmwareversion=6.1c.1353_B20190305

Published CVSS scores

5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.5VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
6.4VulDBAV:N/AC:L/Au:N/C:N/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-73External Control of File Name or Path
T1485Data Destruction

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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