CVE-2021-39048

Local client crash via improper bounds checking

Published Dec 13, 2021 · Updated Sep 17, 2024

Stack-based buffer overflow in IBM Spectrum Protect Client 7.1 and 8.1 allows local users to crash the client through local input. IBM attributes the overwrite to improper bounds checking but has not disclosed the affected function, input field, or parsing path. Exploitation requires local access and affects availability only by terminating the client, with no reported data disclosure or modification.

CVSS severity6.2
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in IBM Spectrum Protect Client 7.1 and 8.1 allows local users to crash the client through local input. IBM attributes the overwrite to improper bounds checking but has not disclosed the affected function, input field, or parsing path. Exploitation requires local access and affects availability only by terminating the client, with no reported data disclosure or modification.

The record

CVE
CVE-2021-39048
Published
Dec 13, 2021
Updated
Sep 17, 2024
Vendor
IBM
Product
IBM Storage Protect
Classifications
CWE-787, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 13, 2021CVE 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=7.1
  2. Affected versionversion=8.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

IBM · IBM Storage Protectversion=7.1; version=8.1

Published CVSS scores

6.2IBMCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

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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