CVE-2011-5282Network attack vector

Outbound message disclosure via flawed message chopping

Published Jan 21, 2020 · Updated Aug 7, 2024

Information disclosure in mIRC before 7.22 allows remote attackers to receive a subsequent outbound message after an earlier message is chopped. The outbound-message chopping logic mishandles message boundaries in a specific context and leaks the message that follows. Reaching the flaw requires mIRC to chop an outgoing message in that undisclosed context; the reported consequence is exposure of the subsequent message only.

CVSS severity5.3
Medium
EPSS probability1.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in mIRC before 7.22 allows remote attackers to receive a subsequent outbound message after an earlier message is chopped. The outbound-message chopping logic mishandles message boundaries in a specific context and leaks the message that follows. Reaching the flaw requires mIRC to chop an outgoing message in that undisclosed context; the reported consequence is exposure of the subsequent message only.

The record

CVE
CVE-2011-5282
Published
Jan 21, 2020
Updated
Aug 7, 2024
Vendor
mIRC Company Limited
Product
mIRC
Classifications
CWE-200
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 7, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=prior to 7.22

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

mIRC Company Limited · mIRCversion=prior to 7.22

Published CVSS scores

5.3NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:P/I:N/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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