CVE-2020-37202Public exploit

Application crash via oversized registration key

Published Feb 11, 2026 · Updated Feb 11, 2026

Buffer overflow in Nsasoft NetworkSleuth 3.0.0.0 allows attackers to crash the application by entering an oversized registration key. The registration dialog copies a 1,000-character Key value into an undersized buffer without checking its length. Exploitation requires an operator to paste the generated payload into the Key field and click OK, after which the process exits.

CVSS severity4.6
Medium
EPSS probability0.35%
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 Nsasoft NetworkSleuth 3.0.0.0 allows attackers to crash the application by entering an oversized registration key. The registration dialog copies a 1,000-character Key value into an undersized buffer without checking its length. Exploitation requires an operator to paste the generated payload into the Key field and click OK, after which the process exits.

The record

CVE
CVE-2020-37202
Published
Feb 11, 2026
Updated
Feb 11, 2026
Vendor
Nsasoft
Product
NetworkSleuth
Classifications
CWE-120, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 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?

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

  1. Affected versionversion=3.0.0.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Nsasoft · NetworkSleuthversion=3.0.0.0

Published CVSS scores

7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.6VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA: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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Application or System Exploitation

Public exploit references

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Technologies

Your stack

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Your stack

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