CVE-2025-14673Public exploitNetwork attack vector

Process crash via unchecked FFI buffer size

Published Dec 14, 2025 · Updated Dec 14, 2025

Heap-based buffer overflow in gmg137 snap7-rs 1.142.0 and 1.142.1 allows remote attackers to crash consuming processes via crafted input. S7Client::as_ct_write casts a Rust slice fat pointer to void* and fails to ensure the requested write size fits the backing buffer, causing an out-of-bounds read in AsWriteArea. Reachability requires a consuming application to pass attacker-controlled count and buffer values into this client API; the demonstrated consequence is a process crash.

CVSS severity7.3
High
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in gmg137 snap7-rs 1.142.0 and 1.142.1 allows remote attackers to crash consuming processes via crafted input. S7Client::as_ct_write casts a Rust slice fat pointer to void* and fails to ensure the requested write size fits the backing buffer, causing an out-of-bounds read in AsWriteArea. Reachability requires a consuming application to pass attacker-controlled count and buffer values into this client API; the demonstrated consequence is a process crash.

The record

CVE
CVE-2025-14673
Published
Dec 14, 2025
Updated
Dec 14, 2025
Vendor
gmg137
Product
snap7-rs
Classifications
CWE-119, CWE-122
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 14, 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=1.142.0
  2. Affected versionversion=1.142.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

gmg137 · snap7-rsversion=1.142.0; version=1.142.1

Published CVSS scores

5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.3VulDBCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-122Heap-based Buffer Overflow

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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