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.

Attack Vector Adjacent Network

Attack Complexity High

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Adjacent Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
miniupnp project miniupnpc unaffected
Version Status Constraints
0 affected ≤ 2.3.3

No data.

No data.

No data.

Project Subscriptions

Vendors Products
Miniupnp Project Subscribe
Miniupnpc Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/miniupnp/miniupnp cve-icon cve-icon
https://github.com/miniupnp/miniupnp/blob/bf4215a7574f88aa55859db9db00e3ae58cf42d6/miniupnpc/src/minixml.c#L141 cve-icon cve-icon
https://github.com/miniupnp/miniupnp/commit/64ef08a12aabab57be0bf7e40f047c8f14dedf9c cve-icon cve-icon
https://hackmd.io/@haind-pwn/miniupnpc-minixml-oob-read cve-icon cve-icon
https://www.vulncheck.com/advisories/miniupnpc-through-2.3.3-heap-out-of-bounds-read-via-minixml-parseelt cve-icon cve-icon
History

Wed, 14 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
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.
Title miniupnpc through 2.3.3 Heap Out-of-Bounds Read via minixml parseelt
First Time appeared Miniupnp Project
Miniupnp Project miniupnpc
Weaknesses CWE-125
CPEs cpe:2.3:a:miniupnp_project:miniupnpc:*:*:*:*:*:*:*:*
Vendors & Products Miniupnp Project
Miniupnp Project miniupnpc
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 2.3, 'vector': 'CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-14T15:01:23.198Z

Reserved: 2026-10-14T13:08:39.334Z

Link: CVE-2026-110656

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-14T16:17:42.363

Modified: 2026-10-14T16:17:42.363

Link: CVE-2026-110656

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses