CVE-2023-5459

Unauthenticated service interruption via password transmission

Published Oct 9, 2023 · Updated Sep 19, 2024

Denial of service in Delta Electronics DVP-ES2 Series PLC 1.48 allows attackers to interrupt operation via password transmission. The public record identifies the Password Transmission Handler but does not disclose the malformed input or resource-handling error that causes the interruption. No authentication or user interaction is required; published assessments disagree whether network or adjacent access is required, and the resulting hang, crash, or reboot behavior remains undisclosed.

CVSS severity6.5
Medium
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Delta Electronics DVP-ES2 Series PLC 1.48 allows attackers to interrupt operation via password transmission. The public record identifies the Password Transmission Handler but does not disclose the malformed input or resource-handling error that causes the interruption. No authentication or user interaction is required; published assessments disagree whether network or adjacent access is required, and the resulting hang, crash, or reboot behavior remains undisclosed.

The record

CVE
CVE-2023-5459
Published
Oct 9, 2023
Updated
Sep 19, 2024
Vendor
Delta Electronics, Inc.
Product
DVP-ES2 Series PLC
Classifications
CWE-404, T0814
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 2024Record 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=1.48

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Delta Electronics, Inc. · DVP-ES2 Series PLCversion=1.48

Published CVSS scores

6.5VulDBCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
T0814Denial of Service

Public exploit references

No public exploit references are available in this record.

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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