Security readout for executives and security teams
Plain-English summary
GurumDDS has a heap memory handling flaw that can crash affected systems and may allow remote code execution. The bundle says all versions are affected. Business urgency is high where GurumDDS supports operational or industrial systems, especially if reachable from untrusted networks.
Executive priority
Prioritize within the current remediation cycle, faster for exposed operational systems. The combination of remote reachability, no authentication, and possible code execution creates material operational risk.
Technical view
CVE-2021-38439 is a CWE-122 heap-based buffer overflow in GurumNetworks GurumDDS. The CVSS 3.1 vector is network-accessible, low-complexity, no privileges, and no user interaction, with high availability impact and lower confidentiality/integrity impact.
Likely exposure
Exposure is likely limited to organizations running GurumDDS. Risk is highest where GurumDDS is deployed in operational environments or is reachable across broad internal, partner, or internet-adjacent networks.
Exploitation context
The provided bundle does not state active exploitation, and the CVE is not marked in CISA KEV. Treat exploitation as plausible from the technical characteristics, but not confirmed by the supplied sources.
Researcher notes
Evidence is limited to the CVE metadata and CISA advisory reference in the bundle. No exploit details, affected component internals, or named fixed version are included here, so validation should focus on presence, reachability, and vendor guidance.
Mitigation direction
- Check GurumNetworks and the CISA advisory for supported fixes or mitigations.
- Inventory GurumDDS deployments and confirm where they are network reachable.
- Restrict GurumDDS access to trusted network segments only.
- Prioritize compensating controls for operational systems that cannot be quickly updated.
- Monitor affected environments for crashes or unexpected service behavior.
Validation and detection
- Confirm whether GurumDDS is installed and record exact deployment locations.
- Map network paths to GurumDDS from user, partner, and internet-facing zones.
- Verify whether vendor or CISA remediation guidance has been applied.
- Review monitoring for denial-of-service symptoms on systems using GurumDDS.
- Document unresolved exposure and compensating controls for risk acceptance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-122: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-38439 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H3.94.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.6HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-315-02CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.