CVE-2020-7007Network attack vector

Unauthenticated code execution via 802.1X settings overflow

Published Mar 24, 2020 · Updated Aug 4, 2024

A stack-based buffer overflow in Moxa EDS-G516E firmware 5.2 and earlier allows remote attackers to execute code or crash the switch. Moxa identifies the IEEE 802.1X web settings page as the locus but does not disclose the affected parameter or copy operation. The management interface must be network-reachable; successful exploitation permits arbitrary code execution or takes the device out of service.

CVSS severity9.8
Critical
EPSS probability2.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A stack-based buffer overflow in Moxa EDS-G516E firmware 5.2 and earlier allows remote attackers to execute code or crash the switch. Moxa identifies the IEEE 802.1X web settings page as the locus but does not disclose the affected parameter or copy operation. The management interface must be network-reachable; successful exploitation permits arbitrary code execution or takes the device out of service.

The record

CVE
CVE-2020-7007
Published
Mar 24, 2020
Updated
Aug 4, 2024
Vendor
Moxa
Product
EDS-G516E Series Ethernet Switches
Classifications
CWE-787, CWE-121, T0866
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 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 EDS-G516E Series firmware, Version 5.2 or lower

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Moxa · EDS-G516E Series Ethernet Switchesversion=Moxa EDS-G516E Series firmware, Version 5.2 or lower

Published CVSS scores

10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-121Stack-based Buffer Overflow
T0866Exploitation of Remote Services

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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