CVE-2022-44255Network attack vector

Pre-authentication memory corruption via oversized POST data

Published Nov 23, 2022 · Updated Apr 25, 2025

A pre-authentication buffer overflow in TOTOLINK LR350 firmware 9.3.5u.6369_B20220309 allows remote attackers to corrupt memory via long POST data. The firmware's main function processes oversized POST content without keeping the write within the destination buffer. No credentials or user interaction are required, and published evidence does not establish whether the corruption causes only a crash or enables code execution.

CVSS severity9.8
Critical
EPSS probability2.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A pre-authentication buffer overflow in TOTOLINK LR350 firmware 9.3.5u.6369_B20220309 allows remote attackers to corrupt memory via long POST data. The firmware's main function processes oversized POST content without keeping the write within the destination buffer. No credentials or user interaction are required, and published evidence does not establish whether the corruption causes only a crash or enables code execution.

The record

CVE
CVE-2022-44255
Published
Nov 23, 2022
Updated
Apr 25, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 25, 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
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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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