CVE-2026-1328Public exploitNetwork attack vector

Authenticated memory corruption via unchecked SSID decoding

Published Jan 22, 2026 · Updated Jan 22, 2026

Buffer overflow in TOTOLINK NR1800X Firmware 9.1.0u.6279_B20210910 allows remote authenticated users to corrupt memory via an ssid value. setWizardCfg passes the user-controlled ssid to urldecode, which writes decoded bytes to its destination without enforcing a destination-size bound. A valid session is required; public evidence establishes memory corruption but no specific post-corruption outcome.

CVSS severity8.8
High
EPSS probability0.80%
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 NR1800X Firmware 9.1.0u.6279_B20210910 allows remote authenticated users to corrupt memory via an ssid value. setWizardCfg passes the user-controlled ssid to urldecode, which writes decoded bytes to its destination without enforcing a destination-size bound. A valid session is required; public evidence establishes memory corruption but no specific post-corruption outcome.

The record

CVE
CVE-2026-1328
Published
Jan 22, 2026
Updated
Jan 22, 2026
Vendor
TOTOLINK
Product
NR1800X Firmware
Classifications
CWE-120, CWE-119, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 22, 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=9.1.0u.6279_B20210910

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · NR1800X Firmwareversion=9.1.0u.6279_B20210910

Published CVSS scores

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
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

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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