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CVE-2026-110656— miniupnpc through 2.3.3 Heap Out-of-Bounds Read via minixml parseelt

Quick assessment

Affected
miniupnp project miniupnpc
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.

miniupnpc 在 2.3.3 及更早版本中存在一个堆溢出读取漏洞（一次字节超出边界读取），该漏洞位于 minixml 的 函数处理命名空间前缀的逻辑中。在处理命名空间前缀时，函数在越过冒号（ ）后未进行缓冲区结束检查。本地网络中的恶意或伪造的 UPnP 网关可以向客户端发送包含以冒号（ ）结尾的元素名称的设备描述或 SOAP 响应，从而导致客户端崩溃。

CVSS 3.1 · Low EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services

Affected Version Matrix 1

VendorProduct Version RangeStatus
miniupnp project miniupnpc ≤ 2.3.3 affected
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I. Basic Information for CVE-2026-110656

Vulnerability Information
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Vulnerability Title
miniupnpc through 2.3.3 Heap Out-of-Bounds Read via minixml parseelt
Source: CVE Program / CVE List V5
Vulnerability Description
miniupnpc through 2.3.3 contains a one-byte heap out-of-bounds read vulnerability in the minixml parseelt function's namespace-prefix handling that skips an end-of-buffer check after advancing past ':'. A malicious or spoofed UPnP gateway on the local network can send a device description or SOAP reply ending in ':' within an element name to crash the client.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
miniupnp project miniupnpc 0 ~ 2.3.3 -

II. Public POCs for CVE-2026-110656

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III. Intelligence Information for CVE-2026-110656

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Patches & Fixes for CVE-2026-110656 (1)

Other References for CVE-2026-110656 (3)

IV. Related Vulnerabilities

Same product: miniupnpc
Same vendor: miniupnp project
Same weakness: CWE-125

V. Comments for CVE-2026-110656

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