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CVE-2026-16225— davenardella snap7 s7_peer.cpp NegotiatePDULength out-of-bounds write

Quick assessment

Affected
davenardella snap7
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Dave Nardella Snap7是Dave Nardella个人开发者的一个动态数据交换服务器软件。 Dave Nardella Snap7存在缓冲区错误漏洞，该漏洞源于函数TSnap7Peer::NegotiatePDULength中参数PDULength操作导致越界写入。以下受影响版本：1.4.0版本、1.4.1版本、1.4.2版本和1.4.3版本。

CVSS 6.3 · Medium EPSS 0.40% · P33

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 4

VendorProduct Version RangeStatus
davenardella snap7 1.4.0 affected
1.4.1 affected
1.4.2 affected
1.4.3 affected
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I. Basic Information for CVE-2026-16225

Vulnerability Information
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Vulnerability Title
davenardella snap7 s7_peer.cpp NegotiatePDULength out-of-bounds write
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in davenardella snap7 up to 1.4.3. The impacted element is the function TSnap7Peer::NegotiatePDULength of the file src/core/s7_peer.cpp. The manipulation of the argument PDULength results in out-of-bounds write. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Dave Nardella Snap7 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Dave Nardella Snap7是Dave Nardella个人开发者的一个动态数据交换服务器软件。 Dave Nardella Snap7存在缓冲区错误漏洞，该漏洞源于函数TSnap7Peer::NegotiatePDULength中参数PDULength操作导致越界写入。以下受影响版本：1.4.0版本、1.4.1版本、1.4.2版本和1.4.3版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
davenardella snap7 1.4.0 cpe:2.3:a:davenardella:snap7:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-16225

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III. Intelligence Information for CVE-2026-16225

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Proof of Concept for CVE-2026-16225 (1)

Other References for CVE-2026-16225 (1)

IV. Related Vulnerabilities

Same product: snap7
Same vendor: davenardella
Same weakness: CWE-787

V. Comments for CVE-2026-16225

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