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    CVE-2021-27734

    Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01 allow remote attackers to change the credentials of existing users.

    Published:May 17, 2021
    Last Modified:Nov 21, 2024
    EPS:May 17, 2021
    EPSS Score:0.00118
    CVSS Score:9.8

    Affected Products

    Vendor
    Belden
    Product
    Hirschmann Hios
    Vendor
    Belden
    Product
    Hisecos

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-287 Improper Authentication

    Related CVEs

    CVE-2018-25236 (CVSS 9.3) — Hirschmann HiOS and HiSecOS products RSP, RSPE, RSPS, RSPL, MSP, EES, EESX, GRS, OS, RED, EAGLE contain an aut…
    CVE-2020-37216 (CVSS 8.7) — Hirschmann HiOS devices versions prior to 08.1.00 and 07.1.01 contain a denial of service vulnerability in th…
    CVE-2025-15620 (CVSS 9.2) — HiOS Switch Platform versions 09.1.00 through 09.4.04 and 10.0.00 through 10.3.00 contain a denial-of-service …
    CVE-2020-9307 (CVSS 6.5) — Hirschmann OS2, RSP, and RSPE devices before HiOS 08.3.00 allow a denial of service. An unauthenticated, adjac…
    CVE-2020-6994 (CVSS 9.8) — A buffer overflow vulnerability was found in some devices of Hirschmann Automation and Control HiOS and HiSecO…
    CVE-2019-12262 (CVSS 9.8) — Wind River VxWorks 6.6, 6.7, 6.8, 6.9 and 7 has Incorrect Access Control in the RARP client component. IPNET s…
    CVE-2019-12261 (CVSS 9.8) — Wind River VxWorks 6.7 though 6.9 and vx7 has a Buffer Overflow in the TCP component (issue 3 of 4). This is a…
    CVE-2019-12260 (CVSS 9.8) — Wind River VxWorks 6.9 and vx7 has a Buffer Overflow in the TCP component (issue 2 of 4). This is an IPNET sec…
    CVE-2019-12258 (CVSS 7.5) — Wind River VxWorks 6.6 through vx7 has Session Fixation in the TCP component. This is a IPNET security vulnera…
    CVE-2019-12255 (CVSS 9.8) — Wind River VxWorks has a Buffer Overflow in the TCP component (issue 1 of 4). This is a IPNET security vulnera…

    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