CVE-2022-46378Public exploitNetwork attack vector

Authenticated service crash via unterminated PORT scan

Published May 10, 2023 · Updated Nov 4, 2025

Out-of-bounds read in uC/FTPs 1.98.00 allows remote authenticated users to crash the FTP service with an argumentless PORT command. FTPs_ProcessCtrlCmd scans beyond the NUL-terminated receive buffer while seeking two port-number digits because its loop checks the pointer rather than the pointed-to byte. A valid FTP session is required, and the demonstrated consequence is service termination rather than data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability1.42%
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

Out-of-bounds read in uC/FTPs 1.98.00 allows remote authenticated users to crash the FTP service with an argumentless PORT command. FTPs_ProcessCtrlCmd scans beyond the NUL-terminated receive buffer while seeking two port-number digits because its loop checks the pointer rather than the pointed-to byte. A valid FTP session is required, and the demonstrated consequence is service termination rather than data disclosure or modification.

The record

CVE
CVE-2022-46378
Published
May 10, 2023
Updated
Nov 4, 2025
Vendor
Weston Embedded Solutions
Product
uC/FTPs
Classifications
CWE-125, CWE-823, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record 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=v 1.98.00

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Weston Embedded Solutions · uC/FTPsversion=v 1.98.00

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.5Cisco TalosCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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-125Out-of-bounds Read
CWE-823Use of Out-of-range Pointer Offset
T1499.004Endpoint Denial of Service: Application or System Exploitation

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