CVE-2024-7909Public exploitNetwork attack vector

Remote memory corruption via langType stack overflow

Published Aug 18, 2024 · Updated Aug 21, 2024

Stack-based buffer overflow in TOTOLINK EX1200L 9.3.5u.6146_B20201023 allows remote authenticated users to corrupt memory via langType. The setLanguageCfg handler in /www/cgi-bin/cstecgi.cgi copies the request value into a stack variable without enforcing its capacity. Low-privileged CGI access is sufficient; the resulting corruption can crash the service or alter execution, although public records do not demonstrate code execution.

CVSS severity8.7
High
EPSS probability1.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stack-based buffer overflow in TOTOLINK EX1200L 9.3.5u.6146_B20201023 allows remote authenticated users to corrupt memory via langType. The setLanguageCfg handler in /www/cgi-bin/cstecgi.cgi copies the request value into a stack variable without enforcing its capacity. Low-privileged CGI access is sufficient; the resulting corruption can crash the service or alter execution, although public records do not demonstrate code execution.

The record

CVE
CVE-2024-7909
Published
Aug 18, 2024
Updated
Aug 21, 2024
Vendor
TOTOLINK
Product
TOTOLINK EX1200L Firmware
Classifications
CWE-787, CWE-121, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 · TOTOLINK EX1200L Firmwareversion=9.3.5u.6146_b20201023
TOTOLINK · EX1200Lversion=9.3.5u.6146_B20201023

Published CVSS scores

8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.7VulDBCVSS: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:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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-787Out-of-bounds Write
CWE-121Stack-based Buffer 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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo