CVE-2019-5148Network attack vector

Device crash via unchecked ServiceAgent bundle length

Published Feb 25, 2020 · Updated Aug 4, 2024

Out-of-bounds read in ServiceAgent in Moxa AWK-3131A firmware 1.13 and earlier allows remote attackers to crash the device via crafted packets. The parseRecvData function subtracts an unvalidated bundle length from the packet remainder, underflows the copy size, and passes that oversized value to copyRemainingData for a memcpy. No authentication is required; the resulting out-of-bounds or unmapped-memory access terminates ServiceAgent and interrupts the device.

CVSS severity7.5
High
EPSS probability2.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in ServiceAgent in Moxa AWK-3131A firmware 1.13 and earlier allows remote attackers to crash the device via crafted packets. The parseRecvData function subtracts an unvalidated bundle length from the packet remainder, underflows the copy size, and passes that oversized value to copyRemainingData for a memcpy. No authentication is required; the resulting out-of-bounds or unmapped-memory access terminates ServiceAgent and interrupts the device.

The record

CVE
CVE-2019-5148
Published
Feb 25, 2020
Updated
Aug 4, 2024
Vendor
Moxa
Product
AWK-3131A Series
Classifications
CWE-125, CWE-191, T1489
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 25, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=Moxa AWK-3131A Firmware version 1.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Moxa · AWK-3131A Seriesversion=Moxa AWK-3131A Firmware version 1.13

Published CVSS scores

7.5TalosCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CWE-191Integer Underflow (Wrap or Wraparound)
T1489Service Stop

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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