CVE-2025-45788Public exploitNetwork attack vector

Memory corruption via unchecked MAC-filter comment

Published May 8, 2025 · Updated May 12, 2025

Buffer overflow in setMacFilterRules in TOTOLINK A3100R firmware 5.9c.1527 allows remote attackers to corrupt memory via a crafted comment parameter. The handler fails to enforce destination-buffer bounds when processing the attacker-controlled comment value. Network access without authentication or user interaction is sufficient, but public evidence establishes neither a specific crash nor code execution.

CVSS severity9.8
Critical
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in setMacFilterRules in TOTOLINK A3100R firmware 5.9c.1527 allows remote attackers to corrupt memory via a crafted comment parameter. The handler fails to enforce destination-buffer bounds when processing the attacker-controlled comment value. Network access without authentication or user interaction is sufficient, but public evidence establishes neither a specific crash nor code execution.

The record

CVE
CVE-2025-45788
Published
May 8, 2025
Updated
May 12, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, CWE-787, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2025CVE publishedPublication date reported by the CVE source.
  2. May 12, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
9.8NIST NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
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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