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CVE-2020-3977

17
FAUCET Score

CVE-2020-3977 is a broken authentication vulnerability affecting VMware Horizon DaaS versions 7.x and 8.x prior to 8.0.1 Update 1. This flaw allows an authenticated attacker to bypass the two-factor authentication process. Rated Medium severity with a CVSS score of 6.5, the vulnerability has a network attack vector and low attack complexity, potentially leading to high integrity impact. There is currently no public exploit code available, no evidence of active exploitation, and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.0.0, <= 8.0.1CPE matchmatch criteria
cpe:2.3:a:vmware:horizon_daas:*:*:*:*:*:*:*:*
7.0.0CPE matchmatch criteria
cpe:2.3:a:vmware:horizon_daas:7.0.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.96%
Probability of exploitation in next 30 days
EPSS Percentile
57.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0096 is in the 71st percentile among its peer group of 21,977 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

vmwarepatch availablevia nvd_reference
View patch

References

vmware.com / security/advisories/VMSA-2020-0021.html
PatchVendor Advisory