CVE-2021-27768Network attack vector

Account-data interception via missing hostname verification

Published May 12, 2022 · Updated Sep 16, 2024

Improper certificate validation in HCL Verse for Android before 12.0.9 allows man-in-the-middle attackers to intercept account data. During server setup and login, the client accepts a certificate whose hostname does not match the configured server and sends sensitive account traffic through the resulting connection. Exploitation requires a network position capable of transparently proxying the connection while the user completes setup or login; post-login requests were not processed in the reported test.

CVSS severity6.3
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in HCL Verse for Android before 12.0.9 allows man-in-the-middle attackers to intercept account data. During server setup and login, the client accepts a certificate whose hostname does not match the configured server and sends sensitive account traffic through the resulting connection. Exploitation requires a network position capable of transparently proxying the connection while the user completes setup or login; post-login requests were not processed in the reported test.

The record

CVE
CVE-2021-27768
Published
May 12, 2022
Updated
Sep 16, 2024
Vendor
HCLSoftware
Product
HCL Verse for Android
Classifications
CWE-295, CWE-300, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=unspecified <12.0.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCLSoftware · HCL Verse for Androidversion=unspecified <12.0.9

Published CVSS scores

6.3HCL SoftwareCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/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-295Improper Certificate Validation
CWE-300Channel Accessible by Non-Endpoint
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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