CVE-2023-50703

Unauthorized access via cleartext network transmission

Published Dec 19, 2023 · Updated Feb 25, 2026

Cleartext transmission in Efacec UC 500E 10.1.0 allows man-in-the-middle attackers to capture sensitive data over the network. The application sends sensitive information in cleartext, allowing an intermediary to capture material used for application access. Exploitation requires access to the same network path and user interaction; reported impact is disclosure and unauthorized application access.

CVSS severity6.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in Efacec UC 500E 10.1.0 allows man-in-the-middle attackers to capture sensitive data over the network. The application sends sensitive information in cleartext, allowing an intermediary to capture material used for application access. Exploitation requires access to the same network path and user interaction; reported impact is disclosure and unauthorized application access.

The record

CVE
CVE-2023-50703
Published
Dec 19, 2023
Updated
Feb 25, 2026
Vendor
Efacec
Product
UC 500E
Classifications
CWE-319, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 2026Record 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=version 10.1.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Efacec · UC 500Eversion=version 10.1.0

Published CVSS scores

5.9NISTCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
6.3ICS-CERTCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1557Adversary-in-the-Middle

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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