CVE-2026-44296Public exploitNetwork attack vector

Unauthenticated service interruption via blocking TLS failure

Published May 12, 2026 · Updated May 12, 2026

Denial of service in Deskflow before 1.26.0.167 allows remote attackers to stall all server input delivery through malformed TLS handshakes. SecureSocket::secureAccept calls Arch::sleep(1) on the shared multiplexer worker thread after SSL_accept rejects the peer's initial bytes. Network access to TCP port 24800 is sufficient when TLS is enabled; repeated connections make mouse, keyboard, and clipboard delivery unusable during the attack.

CVSS severity7.5
High
EPSS probability0.28%
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 Deskflow before 1.26.0.167 allows remote attackers to stall all server input delivery through malformed TLS handshakes. SecureSocket::secureAccept calls Arch::sleep(1) on the shared multiplexer worker thread after SSL_accept rejects the peer's initial bytes. Network access to TCP port 24800 is sufficient when TLS is enabled; repeated connections make mouse, keyboard, and clipboard delivery unusable during the attack.

The record

CVE
CVE-2026-44296
Published
May 12, 2026
Updated
May 12, 2026
Vendor
Deskflow
Product
Deskflow
Classifications
CWE-400, CWE-405, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=< 1.26.0.167

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Deskflow · Deskflowversion=< 1.26.0.167

Published CVSS scores

7.5GitHub, Inc.CVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-405Asymmetric Resource Consumption (Amplification)
T1499.004Application or System Exploitation

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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