CVE-2026-75012Public exploitNetwork attack vector

Authenticated crash via setPasswordCfg null dereference

Published Aug 17, 2026 · Updated Aug 18, 2026

Null pointer dereference in TOTOLINK EX1200L 9.3.5u.6146_B20201023 allows remote authenticated users to crash cstecgi.cgi via crafted requests. Public records identify the failing locus as setPasswordCfg in /cgi-bin/cstecgi.cgi, but they do not disclose which request field is dereferenced without a null check before the process faults. Reachability is network-based and requires valid credentials per the published CVSS vectors, and the disclosed impact is service interruption rather than code execution or data access.

CVSS severityUnavailable
Unscored
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in TOTOLINK EX1200L 9.3.5u.6146_B20201023 allows remote authenticated users to crash cstecgi.cgi via crafted requests. Public records identify the failing locus as setPasswordCfg in /cgi-bin/cstecgi.cgi, but they do not disclose which request field is dereferenced without a null check before the process faults. Reachability is network-based and requires valid credentials per the published CVSS vectors, and the disclosed impact is service interruption rather than code execution or data access.

The record

CVE
CVE-2026-75012
Published
Aug 17, 2026
Updated
Aug 18, 2026
Vendor
TOTOLINK
Product
EX1200L
Classifications
CWE-404, CWE-476, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 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.6146_B20201023

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · EX1200Lversion=9.3.5u.6146_B20201023

Published CVSS scores

7.1VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
6.8VulDB CNAAV:N/AC:L/Au:S/C:N/I:N/A:C/E:POC/RL:ND/RC:UR
6.5VulDB CNACVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:X/RC:R
6.5VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:X/RC:R

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-404Denial of Service
CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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