CVE-2025-50681Public exploitNetwork attack vector

Daemon crash via igmpPacketKind buffer overflow

Published Dec 19, 2025 · Updated Dec 19, 2025

Buffer overflow in igmpPacketKind in igmpproxy 0.4 allows remote attackers to crash the daemon via malformed IGMP type and code values. The default branch formats attacker-controlled unsigned values with sprintf() into a 20-byte static buffer; hexadecimal values can exceed the nominal two-character width and overwrite the stack. An unauthenticated attacker able to deliver IGMP traffic to a listening interface can terminate the multicast-routing process without reading or modifying data.

CVSS severity7.5
High
EPSS probability0.52%
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 igmpPacketKind in igmpproxy 0.4 allows remote attackers to crash the daemon via malformed IGMP type and code values. The default branch formats attacker-controlled unsigned values with sprintf() into a 20-byte static buffer; hexadecimal values can exceed the nominal two-character width and overwrite the stack. An unauthenticated attacker able to deliver IGMP traffic to a listening interface can terminate the multicast-routing process without reading or modifying data.

The record

CVE
CVE-2025-50681
Published
Dec 19, 2025
Updated
Dec 19, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 19, 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499Endpoint Denial of Service

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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