CVE-2026-101003

A weakness has been identified in Cesanta Mongoose up to 7.21. Affected by this vulnerability is the function fn of the file tutorials/mqtt/mqtt-server/main.c of the component MQTT Broker. Executing a manipulation can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 7.22 addresses this issue. This patch is called a9df523f76f43a38bd53b4232b9cfd4c16869e71. Upgrading the affected component is advised.

CVSS v3 5.3 MEDIUM
CVSS v2.0 5.0 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://github.com/cesanta/mongoose/
https://github.com/cesanta/mongoose/commit/a9df523f76f43a38bd53b4232b9cfd4c16869e71
https://github.com/cesanta/mongoose/releases/tag/7.22
https://vuldb.com/cve/CVE-2026-101003
https://vuldb.com/submit/920005
https://vuldb.com/vuln/410873
https://vuldb.com/vuln/410873/cti

Configurations

No configuration.

History

28 Sep 2026, 06:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-28 06:16

Updated : 2026-10-01 15:17

NVD link : CVE-2026-101003

Mitre link : CVE-2026-101003

CVE.ORG link : CVE-2026-101003

JSON object : View

Products Affected

No product.

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-121

Stack-based Buffer Overflow

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[{"cpes": ["cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*"], "vendor": "Cesanta", "modules": ["MQTT Broker"], "product": "Mongoose", "versions": [{"status": "affected", "version": "7.0"}, {"status": "affected", "version": "7.1"}, {"status": "affected", "version": "7.2"}, {"status": "affected", "version": "7.3"}, {"status": "affected", "version": "7.4"}, {"status": "affected", "version": "7.5"}, {"status": "affected", "version": "7.6"}, {"status": "affected", "version": "7.7"}, {"status": "affected", "version": "7.8"}, {"status": "affected", "version": "7.9"}, {"status": "affected", "version": "7.10"}, {"status": "affected", "version": "7.11"}, {"status": "affected", "version": "7.12"}, {"status": "affected", "version": "7.13"}, {"status": "affected", "version": "7.14"}, {"status": "affected", "version": "7.15"}, {"status": "affected", "version": "7.16"}, {"status": "affected", "version": "7.17"}, {"status": "affected", "version": "7.18"}, {"status": "affected", "version": "7.19"}, {"status": "affected", "version": "7.20"}, {"status": "affected", "version": "7.21"}, {"status": "unaffected", "version": "7.22"}]}]}], "published": "2026-09-28T06:16:31.310", "references": [{"url": "https://github.com/cesanta/mongoose/", "source": "cna@vuldb.com"}, {"url": "https://github.com/cesanta/mongoose/commit/a9df523f76f43a38bd53b4232b9cfd4c16869e71", "source": "cna@vuldb.com"}, {"url": "https://github.com/cesanta/mongoose/releases/tag/7.22", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/cve/CVE-2026-101003", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/submit/920005", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/vuln/410873", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/vuln/410873/cti", "source": "cna@vuldb.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "cna@vuldb.com", "description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-121"}]}], "descriptions": [{"lang": "en", "value": "A weakness has been identified in Cesanta Mongoose up to 7.21. Affected by this vulnerability is the function fn of the file tutorials/mqtt/mqtt-server/main.c of the component MQTT Broker. Executing a manipulation can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 7.22 addresses this issue. This patch is called a9df523f76f43a38bd53b4232b9cfd4c16869e71. Upgrading the affected component is advised."}], "lastModified": "2026-10-01T15:17:20.110", "sourceIdentifier": "cna@vuldb.com"}