CVE-2023-46012Public exploit

Unauthenticated code execution via unchecked UPnP copy

Published May 7, 2024 · Updated Mar 14, 2025

Stack buffer overflow in Linksys EA7500 v3 firmware 3.0.1.207964 allows remote attackers to execute arbitrary code through IGD UPnP. The SetDefaultConnectionService handler passes the unbounded NewConnectionType value and its attacker-controlled length to strncpy, which copies it into a 184-byte stack buffer. The IGD service listens on port 49152 by default, requires no authentication, and executes successful payloads as root.

CVSS severity9.8
Critical
EPSS probability1.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in Linksys EA7500 v3 firmware 3.0.1.207964 allows remote attackers to execute arbitrary code through IGD UPnP. The SetDefaultConnectionService handler passes the unbounded NewConnectionType value and its attacker-controlled length to strncpy, which copies it into a 184-byte stack buffer. The IGD service listens on port 49152 by default, requires no authentication, and executes successful payloads as root.

The record

CVE
CVE-2023-46012
Published
May 7, 2024
Updated
Mar 14, 2025
Vendor
Linksys
Product
EA7500
Classifications
CWE-120, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 14, 2025Record 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=-

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Linksys · EA7500version=-

Published CVSS scores

9.8CISA-ADPCVSS: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.

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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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1210Exploitation of Remote Services

Public exploit references

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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