CVE-2025-55613Public exploitNetwork attack vector

Persistent router crash via unbounded stack copy

Published Aug 22, 2025 · Updated Aug 22, 2025

Stack-based buffer overflow in Tenda O3V2 1.0.0.12(3880) allows remote attackers to crash the router via a crafted mac parameter. The fromSafeSetMacFilter function copies the unbounded mac value into a stack local, overwriting the return address. The published request includes an administrator session cookie and demonstrates a persistent service crash; unauthenticated reachability is not demonstrated.

CVSS severity9.8
Critical
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Tenda O3V2 1.0.0.12(3880) allows remote attackers to crash the router via a crafted mac parameter. The fromSafeSetMacFilter function copies the unbounded mac value into a stack local, overwriting the return address. The published request includes an administrator session cookie and demonstrates a persistent service crash; unauthenticated reachability is not demonstrated.

The record

CVE
CVE-2025-55613
Published
Aug 22, 2025
Updated
Aug 22, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1190Exploit Public-Facing Application

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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