CVE-2020-36971Public exploit

Local code execution via oversized license code

Published Jan 28, 2026 · Updated Jan 28, 2026

Stack buffer overflow in Nidesoft 3GP Video Converter 2.6.18 allows local users to execute arbitrary code through license registration. The License Code field copies an oversized registration string into a fixed-size stack buffer without enforcing its length. Exploitation requires local access to the Windows application and submission of the crafted string, and code runs with the application's privileges.

CVSS severity8.4
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in Nidesoft 3GP Video Converter 2.6.18 allows local users to execute arbitrary code through license registration. The License Code field copies an oversized registration string into a fixed-size stack buffer without enforcing its length. Exploitation requires local access to the Windows application and submission of the crafted string, and code runs with the application's privileges.

The record

CVE
CVE-2020-36971
Published
Jan 28, 2026
Updated
Jan 28, 2026
Vendor
Nidesoft
Product
Nidesoft 3GP Video Converter
Classifications
CWE-121, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=2.6.18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Nidesoft · Nidesoft 3GP Video Converterversion=2.6.18

Published CVSS scores

8.4VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.4VulnCheckCVSS:3.1/AV:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1203Exploitation for Client Execution

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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