dbcve.org
RouterosOperating system · Mikrotik

CVE-2023-32154

HIGH · 7.5 CVSS v3.0 Published 2024-05-03
Fix available
A fix is available. Upgrade to 6.48.7 or later.
See remediation →
80/100
Remediation priority · High
No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Mikrotik RouterOS RADVD Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Mikrotik RouterOS. Authentication is not required to exploit this vulnerability. The specific flaw exists within the Router Advertisement Daemon. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-19797.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

An out-of-bounds write vulnerability exists in the Router Advertisement Daemon (RADVD) component of Mikrotik RouterOS. The flaw results from insufficient validation of user-supplied data during Router Advertisement message processing, allowing an attacker to write past the end of an allocated memory buffer. This memory corruption enables network-adjacent unauthenticated attackers to execute arbitrary code with root privileges.

MitigationApply the Mikrotik RouterOS security update that addresses CVE-2023-32154. If immediate patching is not feasible, restrict network adjacency by isolating affected routers from untrusted network segments to reduce attack surface.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
RouterosOperating system
Affected:< 6.48.7

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Adjacent
Complexity
High
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check RouterOS version
    Run /system resource print or check the login banner to identify the installed RouterOS version
    Affected if The installed version is below 6.48.7 (e.g., 6.48.6, 6.47, 6.46, etc.)
  2. Verify IPv6 router advertisement capability is enabled
    Run /ipv6 nd print or check if IPv6 Neighbor Discovery is configured on interfaces
    Affected if Router Advertisement (RA) messages are being processed on any interface, indicating RADVD functionality is active
  3. Confirm RADVD service status
    Run /tool snmp walk .1.3.6.1.4.1.14988.1.1.3 to check RADVD service state, or inspect /ipv6 nd interface configuration
    Affected if The RADVD service is running and actively sending or processing Router Advertisement messages
  4. Check for custom IPv6 prefix configurations
    Run /ipv6 nd prefix print to enumerate configured prefixes that trigger RA processing
    Affected if Any IPv6 prefixes are configured for advertisement, meaning the vulnerable code path is reachable

A system is affected if it runs RouterOS version below 6.48.7 AND has IPv6 Router Advertisement functionality (RADVD) enabled and processing RA messages on network interfaces.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 6.48.7 or later
Fixed in 6.48.7
Interim mitigation

Apply the Mikrotik RouterOS security update that addresses CVE-2023-32154. If immediate patching is not feasible, restrict network adjacency by isolating affected routers from untrusted network segments to reduce attack surface.

Recommended fix High confidence

RouterOS 6.48.7

  1. Identify all Mikrotik RouterOS devices running versions prior to 6.48.7
  2. Backup the current router configuration via the Web interface, WinBox, or SSH (export command)
  3. Access the router via WinBox, Webfig, or SSH
  4. Navigate to System > Packages or use the /system package check-for-updates command
  5. Download and install RouterOS version 6.48.7 or later
  6. After reboot, verify the upgrade was successful by checking the version with /system resource print
  7. Confirm the Router Advertisement Daemon (RADVD) service is functioning properly
  8. Restore configuration if needed from the backup
Caveat RouterOS upgrades carry inherent risk; ensure backups before proceeding; test in lab environment if possible

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Routeros Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,984.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-32154 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data