Security readout for executives and security teams
Plain-English summary
CVE-2021-35945 is an availability risk in specific Couchbase Server versions. A malicious network packet can crash memcached, a core service component. The public record does not provide CVSS scoring, active exploitation evidence, or a confirmed fixed version in the supplied bundle.
Executive priority
Treat this as a service availability issue for Couchbase-backed applications. Prioritize exposed and critical clusters, but avoid emergency assumptions because the supplied sources do not confirm active exploitation or severity scoring.
Technical view
Couchbase Server 6.5.x, 6.6.0 through 6.6.2, and 7.0.0 are described as affected by a buffer overflow. The stated impact is a memcached crash triggered by a specially crafted network packet. The supplied metadata lacks CWE, CVSS, CPE, and detailed remediation data.
Likely exposure
Exposure is most likely where affected Couchbase Server versions are reachable by untrusted or broadly accessible networks. Internal-only clusters still matter if lateral movement could reach Couchbase service ports.
Exploitation context
The source bundle does not show CISA KEV listing or cited active exploitation. It supports a network-triggered crash scenario, not confirmed remote code execution, data theft, persistence, or public weaponization.
Researcher notes
The public metadata is thin: no CVSS, CWE, CPE, exploit status, or detailed fix information is included. The affected versions come from the CVE title and description, while the impact is limited to crashing memcached.
Mitigation direction
- Identify any Couchbase Server 6.5.x, 6.6.0-6.6.2, or 7.0.0 deployments.
- Check Couchbase release notes and alerts for vendor-confirmed fixed versions or advisories.
- Restrict network access to Couchbase services to trusted hosts and management networks.
- Prioritize upgrade or vendor-recommended remediation for exposed or business-critical clusters.
Validation and detection
- Inventory Couchbase Server versions across production, staging, and backup environments.
- Confirm whether Couchbase service ports are reachable from untrusted networks.
- Review operational logs for unexpected memcached crashes or service restarts.
- Compare installed versions against Couchbase release notes and alerts.
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.
CVE-2021-35945 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://docs.couchbase.com/server/current/release-notes/relnotes.htmlCVE reference · x_refsource_MISC
- https://www.couchbase.com/alertsCVE reference · x_refsource_MISC
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.