CVE-2025-59463

File-transfer denial of service via chunk-size deadlock

Published Oct 27, 2025 · Updated Oct 27, 2025

Deadlock in SICK AG TLOC100-100 firmware allows remote attackers on an adjacent network to interrupt file transfers via mismatched chunks. File-transfer handling deadlocks when chunks use inconsistent sizes, blocking the current transfer and leaving later transfers unable to start. No authentication or user interaction is required, but access is limited to an adjacent network; the reported consequence is file-transfer interruption.

CVSS severity4.3
Medium
EPSS probability0.38%
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

Deadlock in SICK AG TLOC100-100 firmware allows remote attackers on an adjacent network to interrupt file transfers via mismatched chunks. File-transfer handling deadlocks when chunks use inconsistent sizes, blocking the current transfer and leaving later transfers unable to start. No authentication or user interaction is required, but access is limited to an adjacent network; the reported consequence is file-transfer interruption.

The record

CVE
CVE-2025-59463
Published
Oct 27, 2025
Updated
Oct 27, 2025
Vendor
SICK AG
Product
TLOC100-100
Classifications
CWE-833, T0814
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 27, 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=all versions

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

SICK AG · TLOC100-100version=all versions

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.3SICK AGCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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-833Deadlock
T0814Denial of Service

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

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