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CVE Record

CVE-2021-39002: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 uses weak...

IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information.

MediumCVSS 5.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

IBM DB2 used weaker cryptographic algorithms than expected, creating a risk that an attacker could decrypt highly sensitive information. The CVE affects DB2 for Linux, UNIX and Windows, including DB2 Connect Server, versions 9.7, 10.1, 10.5, 11.1, and 11.5.

Executive priority

Prioritize this as a moderate confidentiality risk for sensitive database environments. It does not have confirmed active exploitation in the provided sources, but affected DB2 systems may hold high-value data and should be remediated through IBM guidance.

Technical view

The issue is a network-accessible confidentiality weakness in IBM DB2 LUW and DB2 Connect Server. CVSS 3.0 is 5.9 with no privileges or user interaction required, high attack complexity, and high confidentiality impact. The provided sources do not specify exploit mechanics or exact cryptographic algorithms.

Likely exposure

Exposure is most likely in organizations running affected IBM DB2 LUW or DB2 Connect Server versions, especially legacy database environments handling sensitive records. Internet exposure is not required for business risk; internal attackers or network-positioned threats may matter.

Exploitation context

The source bundle marks CISA KEV as false and provides no cited evidence of active exploitation. The CVSS vector indicates remote attack surface, high complexity, and confidentiality-only impact. Treat exploitation status as unconfirmed, not actively exploited.

Researcher notes

The public bundle confirms affected IBM DB2 versions and the confidentiality impact but lacks algorithm details, exploit prerequisites beyond CVSS, and exact fixed build information. Avoid assuming specific cryptographic failures without reviewing IBM’s advisory content directly.

Mitigation direction

  • Review IBM advisory 6523802 for fixed levels and vendor remediation guidance.
  • Identify and upgrade or remediate affected DB2 9.7, 10.1, 10.5, 11.1, and 11.5 deployments.
  • Review the NetApp advisory if NetApp-supported environments include DB2 exposure.
  • Restrict network access to DB2 services while remediation is planned.
  • Document any vendor-approved compensating controls if immediate upgrade is not feasible.

Validation and detection

  • Inventory DB2 LUW and DB2 Connect Server instances and record exact versions.
  • Compare deployed versions against IBM advisory 6523802 guidance.
  • Confirm DB2 systems handling sensitive data are prioritized first.
  • Check whether DB2 services are reachable from untrusted networks.
  • Track remediation evidence in vulnerability management records.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-39002 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.9 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/A:N/UI:N/S:U/AV:N/PR:N/C:H/AC:H/I:N/E:U/RC:C/RL:O

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.9CVSS 3.0MediumCVSS:3.0/A:N/UI:N/S:U/AV:N/PR:N/C:H/AC:H/I:N/E:U/RC:C/RL:O2.23.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.9Medium
CVSS 3.0 vector shape for CVE-2021-39002Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/A:N/UI:N/S:U/AV:N/PR:N/C:H/AC:H/I:N/E:U/RC:C/RL:O

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
IBMDB2 for Linux, UNIX and Windows10.5, 10.1, 9.7, 11.1, 11.5Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.