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Vulnerability record · CVE-2020-3977 · published 22 September 2020

CVE-2020-3977: Vmware horizon daas missing authentication for critical function vulnerability

Vmware · Horizon Daas

VMware Horizon DaaS (7.x and 8.x before 8.0.1 Update 1) contains a broken authentication vulnerability due to a flaw in the way it handled the first factor authentication. Successful exploitation of this issue may allow an attacker to bypass two-factor authentication process. In order to exploit this issue, an attacker must have a legitimate account on Horizon DaaS.

6.5 CVSS 3.1 Medium EPSS 0.96% · top 39.7% CWE-306 · Missing authentication for critical function
6.5CVSS 3.1 base score, v2 4.0
0.96%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

VMware Horizon DaaS (7.x and 8.x before 8.0.1 Update 1) contains a broken authentication vulnerability due to a flaw in the way it handled the first factor authentication. Successful exploitation of this issue may allow an attacker to bypass two-factor authentication process. In order to exploit this issue, an attacker must have a legitimate account on Horizon DaaS.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.vmware.com/security/advisories/VMSA-2020-0021.html PatchVendor Advisory
https://www.vmware.com/security/advisories/VMSA-2020-0021.html PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2019-5544OpenSLP heap out-of-bounds write in VMware ESXi and Horizon DaaSOpenSLP as shipped in VMware ESXi and Horizon DaaS contains a heap overwrite (out-of-bounds write) flaw. VMware rates it Critical with a maximum CVSS…KEVEPSS 97%analysed8.8CVE-2018-6960Vmware horizon daas improper authentication vulnerabilityVMware Horizon DaaS (7.x before 8.0.0) contains a broken authentication vulnerability that may allow an attacker to bypass two-factor authentication.…EPSS 2.5%5.5CVE-2017-4897Vmware horizon daas improper input validation vulnerabilityVMware Horizon DaaS before 7.0.0 contains a vulnerability that exists due to insufficient validation of data. An attacker may exploit this issue by t…EPSS 1.1%8.8CVE-2026-67277MikroTik RouterOS btest missing authentication leaks kernel memory and crashes kernelRouterOS accepts a "related" btest connection before the primary session is authenticated, letting an unauthenticated client start an IPv4 UDP test. …KEVEPSS 1.6%analysed8.8CVE-2026-59822LiteLLM MCP endpoint auth bypass via OAuth2 passthrough fallbackLiteLLM's MCP Streamable HTTP endpoint, prior to 1.84.0, let an unauthenticated attacker send a fabricated Authorization header that triggered an OAu…KEVEPSS 0.84%analysed9.3CVE-2026-72529TrueConf Server missing authentication allows remote script executionTrueConf Server versions 5.3.X through 5.3.9, 5.4.X through 5.4.9, 5.5.X through 5.5.5, and earlier expose an undocumented function on port 4307/TCP …KEVEPSS 1.5%analysed9.8CVE-2026-46817Oracle E-Business Suite Payments missing authentication allows takeoverOracle Payments in Oracle E-Business Suite 12.2.3 through 12.2.15 contains an easily exploitable flaw in the File Transmission component. An unauthen…KEVEPSS 0.81%analysed9.8CVE-2026-56164Microsoft SharePoint Server missing authentication allows privilege elevationMicrosoft Office SharePoint Server contains a missing authentication flaw in a critical function (CWE-306), letting an unauthenticated attacker reach…KEVEPSS 1.0%analysed

Source: NIST National Vulnerability Database (record CVE-2020-3977), CISA KEV, FIRST EPSS (scores of 2026-10-06). This page is refreshed as NVD updates the record.