CVE-2020-9345Public exploitNetwork attack vector

Web API crash via unbounded WebSocket connections

Published Mar 20, 2020 · Updated Aug 4, 2024

Denial of service in signotec signoPAD-API/Web before 3.1.1 on Windows allows remote attackers to crash the web API via WebSockets. The WebSocket listener accepts an unbounded number of simultaneous sockets; the published page opens 1,000 connections until the service fails. Exploitation requires a victim on the affected Windows host to visit an attacker-controlled website, and the documented consequence is a web API crash.

CVSS severity6.5
Medium
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in signotec signoPAD-API/Web before 3.1.1 on Windows allows remote attackers to crash the web API via WebSockets. The WebSocket listener accepts an unbounded number of simultaneous sockets; the published page opens 1,000 connections until the service fails. Exploitation requires a victim on the affected Windows host to visit an attacker-controlled website, and the documented consequence is a web API crash.

The record

CVE
CVE-2020-9345
Published
Mar 20, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-770, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P

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 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 exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.002Endpoint Denial of Service: Service Exhaustion Flood

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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