CVE-2026-36228Public exploitNetwork attack vector

Service crash via oversized chat recipient field

Published May 22, 2026 · Updated May 22, 2026

Buffer overflow in Easy Chat Server 3.1 allows remote authenticated users to crash the service via a crafted chat message request. The /body2.ghp handler processes an approximately 40,000-character mtowho recipient value without an effective length bound, terminating the server process. The published proof of concept reaches the fault after a valid user joins a chat session; sensitive-data exposure and code execution remain unverified claims in the CVE record.

CVSS severity7.3
High
EPSS probability0.43%
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 Easy Chat Server 3.1 allows remote authenticated users to crash the service via a crafted chat message request. The /body2.ghp handler processes an approximately 40,000-character mtowho recipient value without an effective length bound, terminating the server process. The published proof of concept reaches the fault after a valid user joins a chat session; sensitive-data exposure and code execution remain unverified claims in the CVE record.

The record

CVE
CVE-2026-36228
Published
May 22, 2026
Updated
May 22, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 22, 2026CVE publishedPublication date reported by the CVE source.
  2. May 22, 2026Record 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

7.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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')
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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