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CVE-2026-1951— No checking of the length of the buffer with the directory name in AS320T

Quick assessment

Affected
DeltaWW AS320T
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.

Delta Electronics AS320T是中国台达电子（Delta Electronics）公司的一款用于工业自动化控制的高性能可编程逻辑控制器设备。 Delta Electronics AS320T存在安全漏洞，该漏洞源于未检查带有目录名的缓冲区长度。

CVSS 9.8 · Critical EPSS 0.61% · P47

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-1951

Vulnerability Information
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Vulnerability Title
No checking of the length of the buffer with the directory name in AS320T
Source: CVE Program / CVE List V5
Vulnerability Description
Delta Electronics AS320T has no checking of the length of the buffer with the directory name vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Delta Electronics AS320T 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Delta Electronics AS320T是中国台达电子（Delta Electronics）公司的一款用于工业自动化控制的高性能可编程逻辑控制器设备。 Delta Electronics AS320T存在安全漏洞，该漏洞源于未检查带有目录名的缓冲区长度。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
DeltaWW AS320T 0 ~ 1.10 -

II. Public POCs for CVE-2026-1951

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III. Intelligence Information for CVE-2026-1951

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Other References for CVE-2026-1951 (1)

Same Patch Batch · DeltaWW · 2026-04-24 · 4 CVEs total

CVE-2026-1949 9.8 CRITICAL Incorrect calculation of buffer size on the stack in AS320T
CVE-2026-1950 9.8 CRITICAL No checking of the length of the buffer with the file name in AS320T
CVE-2026-1952 9.8 CRITICAL Denial of service via the undocumented subfunction in AS320T

IV. Related Vulnerabilities

Same product: AS320T
Same vendor: DeltaWW
Same weakness: CWE-121

V. Comments for CVE-2026-1951

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