CVE-2026-1156Public exploitNetwork attack vector

Memory corruption via unchecked SSID URL decoding

Published Jan 19, 2026 · Updated Jan 19, 2026

Buffer overflow in TOTOLINK LR350 9.3.5u.6369_B20220309 allows remote authenticated users to corrupt memory via a crafted SSID. The urldecode routine copies the decoded ssid value byte by byte into a stack buffer without enforcing its capacity. A valid session cookie and network access to the management CGI are required; oversized input can compromise confidentiality, integrity, and availability.

CVSS severity8.8
High
EPSS probability0.72%
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 corrupt memory via a crafted SSID. The urldecode routine copies the decoded ssid value byte by byte into a stack buffer without enforcing its capacity. A valid session cookie and network access to the management CGI are required; oversized input can compromise confidentiality, integrity, and availability.

The record

CVE
CVE-2026-1156
Published
Jan 19, 2026
Updated
Jan 19, 2026
Vendor
TOTOLINK
Product
LR350
Classifications
CWE-120, CWE-119, 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

7.4VulDBCVSS: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
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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 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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
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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