CVE-2021-39076Network attack vector

Sensitive-data decryption via weak cryptography

Published Apr 19, 2022 · Updated Sep 17, 2024

Cryptographic weakness in IBM Security Guardium 10.5 and 11.3 allows remote attackers to decrypt sensitive information over network connections. Guardium enables weaker-than-expected TLS algorithms, allowing a network attacker able to negotiate the affected service to recover protected data; exploitation requires no account but a favorable high-complexity negotiation.

CVSS severity3.7
Low
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cryptographic weakness in IBM Security Guardium 10.5 and 11.3 allows remote attackers to decrypt sensitive information over network connections. Guardium enables weaker-than-expected TLS algorithms, allowing a network attacker able to negotiate the affected service to recover protected data; exploitation requires no account but a favorable high-complexity negotiation.

The record

CVE
CVE-2021-39076
Published
Apr 19, 2022
Updated
Sep 17, 2024
Vendor
IBM
Product
IBM Security Guardium
Classifications
CWE-327
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 19, 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=10.5
  2. Affected versionversion=11.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM Security Guardiumversion=10.5; version=11.3

Published CVSS scores

3.7IBM PSIRTCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/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-327Use of Broken or Risky Cryptographic Algorithm

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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