CVE-2026-1155Public exploitNetwork attack vector

Authenticated device compromise via oversized SSID

Published Jan 19, 2026 · Updated Jan 19, 2026

Buffer overflow in TOTOLINK LR350 9.3.5u.6369_B20220309 allows remote authenticated users to compromise the router via a crafted SSID. The setWiFiEasyGuestCfg function in /cgi-bin/cstecgi.cgi accepts an oversized ssid argument and writes beyond its destination buffer. Low-privilege access to the network management interface is required; successful exploitation can expose data, alter router state, or interrupt service.

CVSS severity8.8
High
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in TOTOLINK LR350 9.3.5u.6369_B20220309 allows remote authenticated users to compromise the router via a crafted SSID. The setWiFiEasyGuestCfg function in /cgi-bin/cstecgi.cgi accepts an oversized ssid argument and writes beyond its destination buffer. Low-privilege access to the network management interface is required; successful exploitation can expose data, alter router state, or interrupt service.

The record

CVE
CVE-2026-1155
Published
Jan 19, 2026
Updated
Jan 19, 2026
Vendor
TOTOLINK
Product
LR350
Classifications
CWE-119, CWE-120, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 19, 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=9.3.5u.6369_B20220309

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · LR350version=9.3.5u.6369_B20220309

Published CVSS scores

8.8VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0VulDB CNAAV:N/AC:L/Au:S/C:C/I:C/A:C
8.7VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E: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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Memory Corruption
CWE-120Buffer Overflow
T1190Exploit Public-Facing Application

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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