CVE-2024-7157Public exploitNetwork attack vector

Authenticated code execution via unchecked http_host length

Published Jul 28, 2024 · Updated Aug 1, 2024

Buffer overflow in TOTOLINK A3100R 4.1.2cu.5050_B20200504 allows remote authenticated users to execute code via a crafted http_host value. The getSaveConfig handler for /cgi-bin/cstecgi.cgi reads http_host without validating its length before placing it in a buffer. A low-privileged management session can submit the request to crash the router or execute arbitrary code in its firmware context.

CVSS severity8.8
High
EPSS probability7.37%
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 A3100R 4.1.2cu.5050_B20200504 allows remote authenticated users to execute code via a crafted http_host value. The getSaveConfig handler for /cgi-bin/cstecgi.cgi reads http_host without validating its length before placing it in a buffer. A low-privileged management session can submit the request to crash the router or execute arbitrary code in its firmware context.

The record

CVE
CVE-2024-7157
Published
Jul 28, 2024
Updated
Aug 1, 2024
Vendor
TOTOLINK
Product
A3100R
Classifications
CWE-120, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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=4.1.2cu.5050_b20200504
  2. Affected versionversion=4.1.2cu.5050_B20200504

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · A3100Rversion=4.1.2cu.5050_b20200504; version=4.1.2cu.5050_B20200504

Published CVSS scores

9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
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
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
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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