CVE-2022-46377Public exploitNetwork attack vector

Authenticated service crash via unbounded PORT parsing

Published May 10, 2023 · Updated Nov 4, 2025

Out-of-bounds read in Weston Embedded uC-FTPs 1.98.00 allows remote authenticated users to crash the FTP server via a PORT command. FTPs_ProcessCtrlCmd searches for an ASCII digit without stopping at the command buffer's NUL terminator, advances beyond received data, and dereferences unmapped memory. Exploitation requires an authenticated FTP session and interrupts availability by terminating the server process.

CVSS severity6.5
Medium
EPSS probability1.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Weston Embedded uC-FTPs 1.98.00 allows remote authenticated users to crash the FTP server via a PORT command. FTPs_ProcessCtrlCmd searches for an ASCII digit without stopping at the command buffer's NUL terminator, advances beyond received data, and dereferences unmapped memory. Exploitation requires an authenticated FTP session and interrupts availability by terminating the server process.

The record

CVE
CVE-2022-46377
Published
May 10, 2023
Updated
Nov 4, 2025
Vendor
Weston Embedded Solutions
Product
uC/FTPs
Classifications
CWE-125, CWE-823, T1499
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

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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

6.5Cisco TalosCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CWE-823Use of Out-of-range Pointer Offset
T1499Endpoint Denial of Service

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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