CVE-2024-22660Public exploitNetwork attack vector

Unauthenticated memory corruption via unchecked lang formatting

Published Jan 23, 2024 · Updated Jun 20, 2025

Stack overflow in setLanguageCfg in TOTOLINK A3700R 9.1.2u.6165_20211012 allows remote attackers to corrupt memory through lang. The handler passes the user-controlled lang value to sprintf for storage in the stack variable V7 without enforcing a safe length, overflowing the stack. Network access to /cgi-bin/cstecgi.cgi is sufficient under CISA's unauthenticated assessment; the published proof of concept demonstrates program-counter control, while execution of attacker-supplied code is not demonstrated.

CVSS severity9.8
Critical
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in setLanguageCfg in TOTOLINK A3700R 9.1.2u.6165_20211012 allows remote attackers to corrupt memory through lang. The handler passes the user-controlled lang value to sprintf for storage in the stack variable V7 without enforcing a safe length, overflowing the stack. Network access to /cgi-bin/cstecgi.cgi is sufficient under CISA's unauthenticated assessment; the published proof of concept demonstrates program-counter control, while execution of attacker-supplied code is not demonstrated.

The record

CVE
CVE-2024-22660
Published
Jan 23, 2024
Updated
Jun 20, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 23, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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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