CVE-2026-1952

Critical

Published: 24 April 2026

Published

24 April 2026

Modified

11 May 2026

KEV Added

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Patch

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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0027 19.1th percentile

Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-1952 is a critical-severity Hidden Functionality (CWE-912) vulnerability in Deltaww As320T Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 19.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 CM-7 (Least Functionality) and SC-5 (Denial-of-service Protection).

Deeper analysis

CVE-2026-1952 is a vulnerability in Delta Electronics AS320T that enables denial of service through an undocumented subfunction. This issue is classified under CWE-912 (Hidden Functionality) and carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating critical severity with high impacts across confidentiality, integrity, and availability.

An unauthenticated attacker with network access can exploit this vulnerability due to its low attack complexity and lack of required privileges or user interaction. Exploitation grants high-level disruption, potentially compromising data confidentiality, system integrity, and availability on the affected device.

Delta Electronics has issued advisory PCSA-2026-00006, which covers multiple vulnerabilities in AS320T including CVE-2026-1949, CVE-2026-1950, CVE-2026-1951, and CVE-2026-1952. The advisory PDF is available at https://filecenter.deltaww.com/news/download/doc/Delta-PCSA-2026-00006_AS320T%20Multiple%20vulnerabilities%20(CVE-2026-1949,%201950,%201951,%201952).pdf.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-25404

Vulnerability details

Delta Electronics AS320T has denial of service via the undocumented subfunction vulnerability.

CWE(s): CWE-912

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

Remote unauthenticated exploitation of hidden functionality in a network-exposed industrial device directly maps to exploitation of public-facing applications.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0