CVE-2026-19971

Backup access via missing authentication

Published Aug 17, 2026 · Updated Aug 17, 2026

Missing authentication in the Backup Endpoint in LB-Link WR1210M 1.0.3 allows adjacent attackers to access backup.cgi via the local network. The main handler in /www/cgi-bin/backup.cgi does not verify requester identity before processing backup endpoint requests, leaving the CGI endpoint reachable without login from the LAN. Exploitation requires reachability from the same local network, and the published scoring limits the observed impact to confidentiality rather than device modification or service interruption.

CVSS severity5.3
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in the Backup Endpoint in LB-Link WR1210M 1.0.3 allows adjacent attackers to access backup.cgi via the local network. The main handler in /www/cgi-bin/backup.cgi does not verify requester identity before processing backup endpoint requests, leaving the CGI endpoint reachable without login from the LAN. Exploitation requires reachability from the same local network, and the published scoring limits the observed impact to confidentiality rather than device modification or service interruption.

The record

CVE
CVE-2026-19971
Published
Aug 17, 2026
Updated
Aug 17, 2026
Vendor
LB-LINK
Product
WR1210M
Classifications
CWE-306, CWE-287, T1190
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 17, 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=1.0.3

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

LB-LINK · WR1210Mversion=1.0.3

Published CVSS scores

4.7VulDBCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
3.3VulDBAV:A/AC:L/Au:N/C:P/I:N/A:N
5.3VulDBCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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