CVE-2021-27779Network attack vector

Server impersonation or communication eavesdropping

Published May 25, 2022 · Updated Sep 17, 2024

Missing encryption in HCL VersionVault Express 2.0.x allows remote attackers to obtain data used for server impersonation or eavesdropping. HCL has not published which component exposes the sensitive information, what the information contains, or the operation that reveals it. The network path requires no authentication or user interaction, and the reported consequence is limited to impersonating the server or monitoring its communications.

CVSS severity9.1
Critical
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing encryption in HCL VersionVault Express 2.0.x allows remote attackers to obtain data used for server impersonation or eavesdropping. HCL has not published which component exposes the sensitive information, what the information contains, or the operation that reveals it. The network path requires no authentication or user interaction, and the reported consequence is limited to impersonating the server or monitoring its communications.

The record

CVE
CVE-2021-27779
Published
May 25, 2022
Updated
Sep 17, 2024
Vendor
HCL Software
Product
HCL VersionVault Express
Classifications
CWE-311, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=2.0.x

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCL Software · HCL VersionVault Expressversion=2.0.x

Published CVSS scores

9.1HCL SoftwareCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.4NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:N
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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

CWE-311Missing Encryption of Sensitive Data
T1557Adversary-in-the-Middle

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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