CVE-2022-29397Public exploitNetwork attack vector

Unauthenticated memory corruption via unchecked comment copy

Published May 10, 2022 · Updated Aug 3, 2024

Stack-based buffer overflow in TOTOLINK N600R firmware 4.3.0cu.7647_B20210106 allows remote attackers to corrupt process memory. The cstecgi.cgi handler's FUN_004196c8 copies the JSON comment value into a fixed-size stack buffer without validating its length. The network path requires neither authentication nor user interaction; the published proof of concept establishes memory corruption, not code execution.

CVSS severity9.8
Critical
EPSS probability1.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in TOTOLINK N600R firmware 4.3.0cu.7647_B20210106 allows remote attackers to corrupt process memory. The cstecgi.cgi handler's FUN_004196c8 copies the JSON comment value into a fixed-size stack buffer without validating its length. The network path requires neither authentication nor user interaction; the published proof of concept establishes memory corruption, not code execution.

The record

CVE
CVE-2022-29397
Published
May 10, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 10, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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

10.0NIST NVDAV:N/AC:L/Au:N/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

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
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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