Critical

Stack-based buffer overflow in Delta Electronics AS320T directory name handling

IdentifiersCVE-2026-1951CWE-121· Stack-based Buffer Overflow

CVE-2026-1951 affects Delta Electronics AS320T. According to the provided CVE description, the product does not properly check the length of a buffer associated with the directory name. The issue is classified as CWE-121, indicating a stack-based buffer overflow. Based on the available information, the vulnerability arises from improper bounds checking when processing a directory name, which could allow an attacker to supply an overlong value and corrupt stack memory.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

The provided CVSS v3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating that the vulnerability is remotely exploitable over the network, requires low attack complexity, no privileges, and no user interaction, and can result in high impact to confidentiality, integrity, and availability. Successful exploitation could therefore lead to severe memory corruption outcomes, including potential remote code execution, process compromise, or denial of service. However, the exact post-exploitation behavior is not specified in the provided content.

Mitigation

If you can’t patch tonight, do this now.

Until vendor remediation can be applied, reduce exposure of AS320T devices by restricting network access to trusted management networks only, blocking unnecessary inbound connectivity, segmenting affected devices from untrusted networks, and monitoring for anomalous requests targeting directory-name handling functionality. If the vulnerable service or feature can be disabled without operational impact, disable it. Specific mitigations beyond general exposure reduction are not available from the provided content.

Remediation

Patch, then assume compromise.

Apply the vendor-provided fix referenced in Delta Electronics advisory Delta-PCSA-2026-00006 for AS320T multiple vulnerabilities, including CVE-2026-1951. If a patched firmware or software update is available from Delta Electronics, upgrade affected AS320T devices to the fixed version identified by the vendor advisory.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

DeltawwAs320tapplication

DeltawwAs320t Firmwareoperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

4 SOURCESView more in app

cvefeed high severityNews

Apr 24, 2026

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

A buffer overflow vulnerability in Delta Electronics AS320T caused by improper checking of the length of the buffer associated with the directory name.

What this page doesn’t show

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Exposure mapping

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Threat actor evidence

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Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity3