CVE-2023-32154

Root code execution via RADVD buffer overwrite

Published May 3, 2024 · Updated Sep 20, 2024

Out-of-bounds write in the Router Advertisement Daemon in MikroTik RouterOS allows network-adjacent attackers to execute arbitrary code as root. The daemon fails to validate DNS server data in IPv6 neighbor-discovery messages before writing beyond its allocated buffer. Only RouterOS 6 and 7 devices configured to accept router advertisements are exposed; this uncommon, nondefault condition permits unauthenticated compromise from the same Layer 2 network.

CVSS severity7.5
High
EPSS probability0.61%
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 write in the Router Advertisement Daemon in MikroTik RouterOS allows network-adjacent attackers to execute arbitrary code as root. The daemon fails to validate DNS server data in IPv6 neighbor-discovery messages before writing beyond its allocated buffer. Only RouterOS 6 and 7 devices configured to accept router advertisements are exposed; this uncommon, nondefault condition permits unauthenticated compromise from the same Layer 2 network.

The record

CVE
CVE-2023-32154
Published
May 3, 2024
Updated
Sep 20, 2024
Vendor
MikroTik
Product
RouterOS
Classifications
CWE-787, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 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=0 <6.49.7
  2. Affected versionversion=6.49.7 Stable

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

MikroTik · RouterOSversion=0 <6.49.7; version=6.49.7 Stable

Published CVSS scores

7.5Zero Day InitiativeCVSS:3.0/AV:A/AC:H/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 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-787Out-of-bounds Write
T1210Exploitation of Remote Services

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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