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CVE-2021-20147

22
FAUCET Score

CVE-2021-20147 is a medium-severity vulnerability affecting ManageEngine ADSelfService Plus builds below 6116, allowing an unauthenticated remote attacker to determine the existence of Windows domain users. This information disclosure vulnerability has a CVSS score of 5.3, indicating a low impact on confidentiality and no impact on integrity or availability, with no user interaction required. While no active exploitation or public exploit code has been observed, and community discussion is minimal, organizations using affected versions should consider patching to mitigate this information leakage risk.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.0CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_adselfservice_plus:*:*:*:*:*:*:*:*
6.1CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_adselfservice_plus:6.1:-:*:*:*:*:*:*
6.1CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_adselfservice_plus:6.1:6100:*:*:*:*:*:*
6.1CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_adselfservice_plus:6.1:6101:*:*:*:*:*:*
6.1CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_adselfservice_plus:6.1:6102:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
6.90%
Probability of exploitation in next 30 days
EPSS Percentile
93.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0690 is in the 91st percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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

Vendor Patches (3)

giteavendor investigatingvia llm_extracted
opensshvendor investigatingvia llm_extracted
railsvendor investigatingvia llm_extracted

Vendor Advisories (3)

opensshllm-openssh-744685009c3d6f70MEDIUM

ManageEngine SelfService Plus Multiple Vulnerabilities

Dec 23, 2021
giteallm-gitea-56f6a76d50777700MEDIUM

ManageEngine SelfService Plus Multiple Vulnerabilities

Dec 23, 2021
railsllm-rails-a2830ec68cb77c38MEDIUM

ManageEngine SelfService Plus Multiple Vulnerabilities

Dec 23, 2021

References

tenable.com / security/research/tra-2021-52
ExploitThird Party Advisory