CVE-2025-63927Public exploit

Client crash via concurrent freed-queue access

Published Nov 12, 2025 · Updated Nov 13, 2025

Heap use-after-free in airpig2011 IEC104 through commit be6d841 allows local users to crash a client during multithreaded execution. Iec10x_Scheduled reads two bytes from a queued heap object after IEC10X_Prio_ClearQueue frees it in another client thread. Exploitation requires concurrent local execution of the client and can abort the process; no confidentiality or integrity impact is reported.

CVSS severity4.0
Medium
EPSS probability0.19%
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

Heap use-after-free in airpig2011 IEC104 through commit be6d841 allows local users to crash a client during multithreaded execution. Iec10x_Scheduled reads two bytes from a queued heap object after IEC10X_Prio_ClearQueue frees it in another client thread. Exploitation requires concurrent local execution of the client and can abort the process; no confidentiality or integrity impact is reported.

The record

CVE
CVE-2025-63927
Published
Nov 12, 2025
Updated
Nov 13, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-122, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 13, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.0CISA-ADPCVSS:3.1/AV:L/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
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

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