CVE-2021-2177Network attack vector

Unauthenticated service takeover

Published Apr 22, 2021 · Updated Sep 26, 2024

Unspecified flaw in the Gateway component of Oracle Secure Global Desktop 5.6 allows remote attackers to take over the service. Oracle has not published the vulnerable operation or how crafted traffic defeats the Gateway's security controls. Exploitation requires no authentication and network access through one of multiple supported protocols, with control extending across confidentiality, integrity, and availability.

CVSS severity10.0
Critical
EPSS probability2.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unspecified flaw in the Gateway component of Oracle Secure Global Desktop 5.6 allows remote attackers to take over the service. Oracle has not published the vulnerable operation or how crafted traffic defeats the Gateway's security controls. Exploitation requires no authentication and network access through one of multiple supported protocols, with control extending across confidentiality, integrity, and availability.

The record

CVE
CVE-2021-2177
Published
Apr 22, 2021
Updated
Sep 26, 2024
Vendor
Oracle Corporation
Product
Oracle Secure Global Desktop
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle Secure Global Desktopversion=5.6

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
10.0Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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