Cyber Resilience

CVE-2025-54792

Localsend ≤ 1.17.0

Public PoC
Published
01 August 2025
Modified
17 June 2026
Patch / advisory
View advisory
CVSS Score v4 9.3
Click a component to see what it means
Raw vectorCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0026 17th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2025-54792 is a critical-severity Channel Accessible by Non-Endpoint (CWE-300) vulnerability in Localsend Localsend. Its CVSS base score is 9.3 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Mark-of-the-Web Bypass (T1553.005); ranked at the 17th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to IA-3 (Device Identification and Authentication) and SC-11 (Trusted Path) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A07:2025 Authentication FailuresA08:2025 Software or Data Integrity Failures

EU & UK References

Vulnerability Data

LocalSend is an open-source app to securely share files and messages with nearby devices over local networks without needing an internet connection. In versions 1.16.1 and below, a critical Man-in-the-Middle (MitM) vulnerability in the software's discovery protocol allows an unauthenticated…

more

attacker on the same local network to impersonate legitimate devices, silently intercepting, reading, and modifying any file transfer. This can be used to steal sensitive data or inject malware, like ransomware, into files shared between trusted users. The attack is hardly detectable and easy to implement, posing a severe and immediate security risk. This issue was fixed in version 1.17.0.

CWE(s)
CWE-300CWE-345

Related Threats

MITRE ATT&CK Enterprise Techniques

T1553.005 Mark-of-the-Web Bypass Defense Impairment
Adversaries may abuse specific file formats to subvert Mark-of-the-Web (MOTW) controls.
attack.mitre.org →
T1557 Adversary-in-the-Middle Credential Access
Adversaries may attempt to position themselves between two or more networked devices using an adversary-in-the-middle (AiTM) technique to support follow-on behaviors such as [Network Sniffing](https://attack.
attack.mitre.org →
T1040 Network Sniffing Credential Access
Adversaries may passively sniff network traffic to capture information about an environment, including authentication material passed over the network.
attack.mitre.org →
T1195 Supply Chain Compromise Initial Access
Adversaries may manipulate products or product delivery mechanisms prior to receipt by a final consumer for the purpose of data or system compromise.
attack.mitre.org →
T1195.001 Compromise Software Dependencies and Development Tools Initial Access
Adversaries may manipulate software dependencies and development tools prior to receipt by a final consumer for the purpose of data or system compromise.
attack.mitre.org →
T1195.002 Compromise Software Supply Chain Initial Access
Adversaries may manipulate application software prior to receipt by a final consumer for the purpose of data or system compromise.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-25154Same product: Localsend Localsend
CVE-2025-27142Same product: Localsend Localsend
CVE-2023-44402Shared CWE-345
CVE-2026-25602Shared CWE-345
CVE-2023-37920Shared CWE-345
CVE-2026-47696Shared CWE-345
CVE-2023-36139Shared CWE-345
CVE-2023-43800Shared CWE-345
CVE-2026-9189Shared CWE-345
CVE-2026-33143Shared CWE-345

Affected Assets

localsend
localsend
≤ 1.17.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 13 hardening rules · 5 OS baselines
Validate
Prove the fix (OWASP ASVS)
  • V12.3.5
  • V3.5.5

Mitigating Controls (NIST 800-53 r5) AI

IA-3 Device Identification and Authentication good match

IA-3 mandates device identification and authentication prior to establishing communications, addressing the non-endpoint actor risk.

SC-23 Session Authenticity good match

SC-23 enforces session authenticity protections that verify both endpoints and prevent channel manipulation by outsiders.

SC-11 Trusted Path good match

SC-11 provides an isolated trusted path that cryptographically or physically assures the identities of the two endpoints.

SC-8 Transmission Confidentiality and Integrity good match

SC-8 directly requires cryptographic or equivalent mechanisms to protect the integrity (and confidentiality) of transmitted data, stopping non-endpoint interference.

SI-7 Software, Firmware, and Information Integrity good match

Integrity verification tools detect (but do not stop) the acceptance of data lacking authenticity.

AC-17 Remote Access partial match

AC-17 requires documented usage restrictions and secure configuration for remote access channels, reducing exposure to non-endpoint actors.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-03 mostly match
prevents

Enforces authentication of endpoints, mitigating non-endpoint access but not channel integrity itself.

PR.DS-02 mostly match
prevents

Directly protects integrity of data-in-transit, addressing channel integrity but not endpoint identity verification.

RC.RP-05 mostly match
degrades

CWE-345 directly impairs RC.RP-05's verification of restored-asset integrity/authenticity, largely defeating the outcome while still leaving other restoration-confirmation steps partially viable.

PR.AA-04 partial match
prevents

Supports verification of identity assertions exchanged over the channel.

PR.IR-01 partial match
prevents

Reduces unauthorized network access that could exploit an unprotected channel.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.24 Use of cryptography mostly match
prevents

Cryptography provides channel integrity and can support endpoint authentication.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect missing or weak data authenticity verification.

A.8.5 Secure authentication mostly match
prevents

Secure authentication mechanisms verify actor identity at both ends of the channel.

A.5.14 Information transfer partial match
prevents

Information transfer policies address secure exchange but are high-level and not technical.

A.8.20 Networks security partial match
mitigates

Network security controls directly address channel integrity and endpoint authentication.

A.8.21 Security of network services partial match
mitigates

Security of network services includes measures to verify endpoints and protect channel integrity.

Hardening callouts derived

Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (authoritative rows only; rows rated `none` are excluded).

Oracle Linux 8 (5 rules)
  • V-248574 YUM must be configured to prevent the installation of patches, service packs, device drivers, or OL 8 system components that have not been digitally signed using a certificate that is recognized and approved by the organization. prevents CWE-300, CWE-345
  • V-248575 OL 8 must prevent the installation of software, patches, service packs, device drivers, or operating system components of local packages without verification they have been digitally signed using a certificate that is issued by a Certificate Authority (CA) that is recognized and approved by the organization. prevents CWE-345
  • V-248823 OL 8 must not have the telnet-server package installed. prevents CWE-300
Oracle Linux 9 (2 rules)
  • V-271462 OL 9 must not have a File Transfer Protocol (FTP) server package installed. prevents CWE-300
  • V-271525 OL 9 must have GPG signature verification enabled for all software repositories. prevents CWE-345
RHEL 7 (2 rules)
  • V-204447 The Red Hat Enterprise Linux operating system must prevent the installation of software, patches, service packs, device drivers, or operating system components from a repository without verification they have been digitally signed using a certificate that is issued by a Certificate Authority (CA) that is recognized and approved by the organization. prevents CWE-345
  • V-204448 The Red Hat Enterprise Linux operating system must prevent the installation of software, patches, service packs, device drivers, or operating system components of local packages without verification they have been digitally signed using a certificate that is issued by a Certificate Authority (CA) that is recognized and approved by the organization. prevents CWE-345
RHEL 8 (2 rules)
  • V-230264 RHEL 8 must prevent the installation of software, patches, service packs, device drivers, or operating system components from a repository without verification they have been digitally signed using a certificate that is issued by a Certificate Authority (CA) that is recognized and approved by the organization. prevents CWE-345
  • V-230265 RHEL 8 must prevent the installation of software, patches, service packs, device drivers, or operating system components of local packages without verification they have been digitally signed using a certificate that is issued by a Certificate Authority (CA) that is recognized and approved by the organization. prevents CWE-345
RHEL 9 (1 rule)
  • V-257822 RHEL 9 must have GPG signature verification enabled for all software repositories. prevents CWE-345

References