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    CVE-2018-18764

    An exploitable arbitrary memory read vulnerability exists in the MQTT packet-parsing functionality of Cesanta Mongoose 6.13. It is a heap-based buffer over-read in a parse_mqtt getu16 call. A specially crafted MQTT SUBSCRIBE packet can cause an arbitrary out-of-bounds memory read potentially resulting in information disclosure and denial of service. An attacker needs to send a specially crafted MQTT packet over the network to trigger this vulnerability.

    Published:Oct 26, 2018
    Last Modified:Nov 21, 2024
    EPS:Oct 28, 2018
    EPSS Score:0.00378
    CVSS Score:9.1

    Affected Products

    Vendor
    Cesanta
    Product
    Mongoose

    Exploits

    https://github.com/TiffanyBlue/PoCbyMyself/blob/master/mongoose6.13/mqtt/Cesanta%20Mongoose%20MQTT%20getu16%20heap%20buffer%20overflow1.mdhttps://github.com/TiffanyBlue/PoCbyMyself/blob/master/mongoose6.13/mqtt/Cesanta%20Mongoose%20MQTT%20getu16%20heap%20buffer%20overflow2.mdhttps://github.com/TiffanyBlue/PoCbyMyself/blob/master/mongoose6.13/mqtt/Cesanta%20Mongoose%20MQTT%20getu16%20heap%20buffer%20overflow1.mdhttps://github.com/TiffanyBlue/PoCbyMyself/blob/master/mongoose6.13/mqtt/Cesanta%20Mongoose%20MQTT%20getu16%20heap%20buffer%20overflow2.md

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

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    CVE-2026-73256 (CVSS 9.1) — Mongoose is an embedded web server and network library. Prior to 7.22, a remote unauthenticated attacker can e…
    CVE-2026-73254 (CVSS 5.4) — Mongoose is an embedded web server and network library. Prior to 7.22, an attacker who can create a file with …
    CVE-2026-73258 (CVSS 6.5) — Mongoose is an embedded web server and network library. Prior to 7.22, a remote attacker can place a lone carr…
    CVE-2026-73251 (CVSS 9.3) — Mongoose is an embedded web server and network library. Prior to 7.23, a network attacker can impersonate a TL…
    CVE-2026-73257 (CVSS 9.1) — Mongoose is an embedded web server and network library. Priro to version 7.22, a remote unauthenticated attack…
    CVE-2026-11404 (CVSS 8.7) — Cesanta Mongoose before 7.22 contains an out-of-bounds read in the built-in TLS server function mg_tls_server_…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High