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CVE-2025-55293— Meshtastic allows crafting of specific NodeInfo packets that overwrite any publicKey saved in the NodeDB

Quick assessment

Affected
meshtastic firmware
Exploitation
Public or AI PoC available; prioritize validation
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 2.6.3之前版本存在授权问题漏洞，该漏洞源于绕过公钥验证，可能导致密钥被恶意覆盖。

CVSS 9.4 · Critical EPSS 0.46% · P40
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I. Basic Information for CVE-2025-55293

Vulnerability Information
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Vulnerability Title
Meshtastic allows crafting of specific NodeInfo packets that overwrite any publicKey saved in the NodeDB
Source: CVE Program / CVE List V5
Vulnerability Description
Meshtastic is an open source mesh networking solution. Prior to v2.6.3, an attacker can send NodeInfo with a empty publicKey first, then overwrite it with a new key. First sending a empty key bypasses 'if (p.public_key.size > 0) {', clearing the existing publicKey (and resetting the size to 0) for a known node. Then a new key bypasses 'if (info->user.public_key.size > 0) {', and this malicious key is stored in NodeDB. This vulnerability is fixed in 2.6.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Meshtastic 授权问题漏洞
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 2.6.3之前版本存在授权问题漏洞，该漏洞源于绕过公钥验证，可能导致密钥被恶意覆盖。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
meshtastic firmware < 2.6.3 -

II. Public POCs for CVE-2025-55293

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 11757 chars
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III. Intelligence Information for CVE-2025-55293

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IV. Related Vulnerabilities

Same product: firmware
Same vendor: meshtastic
Same weakness: CWE-287