CVE-2021-27755

Local file modification via path traversal

Published Feb 21, 2022 · Updated Aug 3, 2024

Path traversal in HCL Sametime for Android 11.6.4 and earlier allows local users to write files outside an intended directory. The Android client uses the Java File class without adequately restricting relative path components, but HCL has not disclosed the affected code path. Low-privileged local access is required; the documented impact is file integrity modification, with no confidentiality or availability impact.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in HCL Sametime for Android 11.6.4 and earlier allows local users to write files outside an intended directory. The Android client uses the Java File class without adequately restricting relative path components, but HCL has not disclosed the affected code path. Low-privileged local access is required; the documented impact is file integrity modification, with no confidentiality or availability impact.

The record

CVE
CVE-2021-27755
Published
Feb 21, 2022
Updated
Aug 3, 2024
Vendor
HCL Software
Product
HCL Sametime
Classifications
CWE-22
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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="HCL Sametime 11.6.4 and below"

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

HCL Software · HCL Sametimeversion="HCL Sametime 11.6.4 and below"

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:N/I:P/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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.

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No observations available

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

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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