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Rg Nbr2600s FirmwareOperating system · Ruijie

CVE-2025-25527

MEDIUM · 5.1 CVSS v3.1 Published 2025-02-11
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
56/100
Remediation priority · Elevated
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
Buffer overflow vulnerability in Ruijie RG-NBR2600S Gateway 10.3(4b12) due to the lack of length verification, which is related to the configuration of source address NAT rules. Attackers who successfully exploit this vulnerability can cause the remote target device to crash or execute arbitrary commands.

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 · moderate confidence

A buffer overflow vulnerability exists in Ruijie RG-NBR2600S Gateway v10.3(4b12) due to missing length validation when configuring source address NAT rules. Attackers can send specially crafted NAT configuration input to trigger the overflow, potentially causing device crash or achieving arbitrary command execution.

MitigationApply vendor firmware patch when available; until then, restrict management interface access to trusted networks and monitor for unusual NAT configuration activity.

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
Rg Nbr2600s FirmwareOperating system
Affected:= 10.3\(4b12\)

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
Local
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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 the installed firmware version
    Access the device CLI or web interface and retrieve the firmware version information. In CLI, this is typically shown via 'show version' or 'show system-info' commands. In the web interface, check the system status or firmware info page.
    Affected if The firmware version is exactly 10.3(4b12)
  2. Verify NAT source address configuration functionality is in use
    Check the current NAT configuration via CLI command 'show ip nat' or 'show running-config | include nat', or via the web interface under NAT settings. Look for any source address NAT rules configured.
    Affected if Source address NAT rules are configured and the device firmware is version 10.3(4b12)
  3. Inspect NAT rule configuration for unexpected or malformed entries
    Review all configured NAT rules using 'show ip nat statistics' or by viewing the NAT rule list in the web interface. Look for rules with unusually long source address fields or unexpected values that could indicate manual exploitation attempts.
    Affected if NAT rules contain source addresses with unexpected length or encoding that may indicate attempted exploitation
  4. Check for device crash logs or unexpected reboots
    Review system logs via 'show logging' or check the system uptime via 'show system uptime' to identify any unexpected reboots or crash dumps that could be related to buffer overflow exploitation.
    Affected if There are unexplained crashes or reboots occurring after NAT configuration changes
  5. Audit management interface exposure
    Verify the network accessibility of the device management interface (HTTP/HTTPS/SSH/Telnet). Check ACLs or firewall rules that restrict access to the management interface.
    Affected if The management interface is accessible from untrusted networks and the device runs the affected firmware version

The environment is affected if the device runs firmware version 10.3(4b12) and has source address NAT rules configured, or if there are signs of exploitation such as unexpected crashes or malformed NAT configurations.

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.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply vendor firmware patch when available; until then, restrict management interface access to trusted networks and monitor for unusual NAT configuration activity.

Fix this in Rg Nbr2600s Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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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-2025-25527 in production — separate from our analysis above.

No notes yet

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What this is

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What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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