CVE-2021-47797Public exploit

Application crash via oversized activation keycode

Published Jan 15, 2026 · Updated Jan 15, 2026

Classic buffer overflow in Leawo Prof. Media 11.0.0.1 allows local users to crash the application via an oversized activation keycode. The registration interface processes 6,000 repeated characters in the Keycode field without rejecting the oversized input, and selecting Register terminates the process. Exploitation requires local GUI access or a user to paste the generated text into Activation Center; the demonstrated consequence is only an application crash.

CVSS severity6.7
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Classic buffer overflow in Leawo Prof. Media 11.0.0.1 allows local users to crash the application via an oversized activation keycode. The registration interface processes 6,000 repeated characters in the Keycode field without rejecting the oversized input, and selecting Register terminates the process. Exploitation requires local GUI access or a user to paste the generated text into Activation Center; the demonstrated consequence is only an application crash.

The record

CVE
CVE-2021-47797
Published
Jan 15, 2026
Updated
Jan 15, 2026
Vendor
Leawo Software
Product
Leawo Prof. Media
Classifications
CWE-120, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 15, 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?

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  1. Affected versionversion=11.0.0.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Leawo Software · Leawo Prof. Mediaversion=11.0.0.1

Published CVSS scores

6.7VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5NVDCVSS: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)
Vectorlocal
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

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Technologies

Your stack

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Your stack

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