Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2025-53627— Meshtastic firmware allows forged DMs with no PKC to show up as encrypted

Quick assessment

Affected
meshtastic firmware
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Meshtastic是Meshtastic开源的一种去中心化无线离网网状网络 LoRa 协议。 Meshtastic 2.5版本至2.7.15之前版本存在安全漏洞，该漏洞源于缺少PKI加密标志时的降级攻击路径，可能导致攻击者注入伪造的直接消息。

CVSS 5.3 · Medium EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2025-53627

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Meshtastic firmware allows forged DMs with no PKC to show up as encrypted
Source: CVE Program / CVE List V5
Vulnerability Description
Meshtastic is an open source mesh networking solution. The Meshtastic firmware (starting from version 2.5) introduces asymmetric encryption (PKI) for direct messages, but when the `pki_encrypted` flag is missing, the firmware silently falls back to legacy AES-256-CTR channel encryption. This was an intentional decision to maintain backwards compatibility. However, the end-user applications, like Web app, iOS/Android app, and applications built on top of Meshtastic using the SDK, did not have a way to differentiate between end-to-end encrypted DMs and the legacy DMs. This creates a downgrade attack path where adversaries who know a shared channel key can craft and inject spoofed direct messages that are displayed as if they were PKC encrypted. Users are not given any feedback of whether a direct message was decrypted with PKI or with legacy symmetric encryption, undermining the expected security guarantees of the PKI rollout. Version 2.7.15 fixes this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1287
Source: CVE Program / CVE List V5
Vulnerability Title
Meshtastic 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Meshtastic是Meshtastic开源的一种去中心化无线离网网状网络 LoRa 协议。 Meshtastic 2.5版本至2.7.15之前版本存在安全漏洞，该漏洞源于缺少PKI加密标志时的降级攻击路径，可能导致攻击者注入伪造的直接消息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
meshtastic firmware >= 2.5, < 2.7.15 -

II. Public POCs for CVE-2025-53627

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2025-53627

请登录查看更多情报信息。

Vendor Advisories for CVE-2025-53627 (1)

IV. Related Vulnerabilities

Same product: firmware
Same vendor: meshtastic
Same weakness: CWE-1287

V. Comments for CVE-2025-53627

No comments yet

Leave a comment