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CVE-2026-45255— Remote code execution via installer Wi-Fi access point scans

Quick assessment

Affected
FreeBSD FreeBSD
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.

FreeBSD是FreeBSD基金会的一套类Unix操作系统。 FreeBSD存在操作系统命令注入漏洞，该漏洞源于扫描Wi-Fi网络时未防止shell扩展网络名称，可能导致特制网络名称通过子shell执行命令，攻击者需创建具有特制名称的接入点并在Wi-Fi扫描范围内，用户提示扫描时即触发漏洞，无需选择恶意网络。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.30% · P23

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 3

VendorProduct Version RangeStatus
FreeBSD FreeBSD 15.0-RELEASE< p9 affected
14.4-RELEASE< p5 affected
14.3-RELEASE< p14 affected
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I. Basic Information for CVE-2026-45255

Vulnerability Information
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Vulnerability Title
Remote code execution via installer Wi-Fi access point scans
Source: CVE Program / CVE List V5
Vulnerability Description
When bsdinstall or bsdconfig are prompted to scan for nearby Wi-Fi networks, they build up a list of network names and use bsddialog(1) to prompt the user to select a network. This is implemented using a shell script, and the code which handled network names was not careful to prevent expansion by the shell. As a result, a suitably crafted network name can be used to execute commands via a subshell. The problem can be exploited to execute code as root on the system running bsdinstall or bsdconfig. The attacker would need to create an access point with a specially crafted name and be within range of a Wi-Fi scan. Note that bsdinstall and bsdconfig are vulnerable as soon as the user prompts them to scan for nearby networks; they do not need to actually select the malicious network.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
FreeBSD 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeBSD是FreeBSD基金会的一套类Unix操作系统。 FreeBSD存在操作系统命令注入漏洞，该漏洞源于扫描Wi-Fi网络时未防止shell扩展网络名称，可能导致特制网络名称通过子shell执行命令，攻击者需创建具有特制名称的接入点并在Wi-Fi扫描范围内，用户提示扫描时即触发漏洞，无需选择恶意网络。
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
FreeBSD FreeBSD 15.0-RELEASE ~ p9 -

II. Public POCs for CVE-2026-45255

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III. Intelligence Information for CVE-2026-45255

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Vendor Advisories for CVE-2026-45255 (1)

Same Patch Batch · FreeBSD · 2026-05-21 · 7 CVEs total

CVE-2026-45250 Stack buffer overflow via setcred(2)
CVE-2026-45252 Heap overflow in FUSE_LISTXATTR
CVE-2026-45251 Kernel use-after-free via file descriptor syscalls
CVE-2026-45253 Missing validation in ptrace(PT_SC_REMOTE)
CVE-2026-45254 Incorrect libcap_net limitation list manipulation
CVE-2026-39461 select(2) file descriptor set overflow causes stack overflow

IV. Related Vulnerabilities

Same product: FreeBSD
Same vendor: FreeBSD
Same weakness: CWE-78

V. Comments for CVE-2026-45255

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