---
id: CVE-2025-55067
title: >-
  The TLS4B ATG system is vulnerable to improper handling of Unix time values
  that exceed the 2038 epoch rollover
summary: >-
  The TLS4B ATG system is vulnerable to improper handling of Unix time values
  that exceed the 2038 epoch rollover. When the system clock reaches January 19,
  2038, it resets to December 13, 1901, causing authentication failures and
  disrupti…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H'
cwe:
  - CWE-190
published: '2025-10-23'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T11:10:00.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-55067'
references:
  - url: >-
      https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2025/icsa-25-296-03.json
    label: ics-cert@hq.dhs.gov
  - url: 'https://www.cisa.gov/news-events/ics-advisories/icsa-25-296-03'
    label: ics-cert@hq.dhs.gov
  - url: 'https://www.veeder.com/us/network-security-reminder'
    label: ics-cert@hq.dhs.gov
tags:
  - nvd
epss: 0.00454
epssPercentile: 0.37363
ingestedAt: '2026-10-08T11:31:27.562Z'
---

## Overview

The TLS4B ATG system is vulnerable to improper handling of Unix time values that exceed the 2038 epoch rollover. When the system clock reaches January 19, 2038, it resets to December 13, 1901, causing authentication failures and disrupting core system functionalities such as login access, history visibility, and leak detection termination. This vulnerability could allow an attacker to manipulate the system time to trigger a denial of service (DoS) condition, leading to administrative lockout, operational timer failures, and corrupted log entries.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.