Security readout for executives and security teams
Plain-English summary
CVE-2021-35944 affects Couchbase Server 6.5.x, 6.6.x through 6.6.2, and 7.0.0. A malicious network packet can crash the memcached component, creating a service availability risk. The provided sources do not state code execution, data theft, CVSS score, or confirmed exploitation.
Executive priority
Prioritize this as an availability risk for affected Couchbase environments, especially if reachable beyond trusted internal networks. Urgency is lower than confirmed exploited or code-execution issues, but outages in database infrastructure can affect business operations quickly.
Technical view
The CVE describes a buffer overflow in Couchbase Server where a specially crafted network packet can crash memcached. Impact is documented as a crash, so denial of service is the clearest supported concern. Source data does not provide attack prerequisites, affected CPEs, CVSS metrics, or named fixed versions.
Likely exposure
Exposure is most likely where affected Couchbase Server versions are reachable over a network by untrusted users or systems. Internet-facing, partner-accessible, or poorly segmented Couchbase deployments should be prioritized for review.
Exploitation context
The source bundle does not show CISA KEV listing, public exploitation, exploit availability, or active attacks. Treat exploitation status as unconfirmed; the supported scenario is a crafted network packet causing memcached to crash.
Researcher notes
Evidence is limited to the CVE description and vendor reference URLs. The affected version range is explicit, but severity, CVSS, CWE, prerequisites, and fixed version details are absent from the supplied bundle. Avoid assuming remote code execution or active exploitation.
Mitigation direction
- Identify Couchbase Server 6.5.x, 6.6.x through 6.6.2, and 7.0.0 deployments.
- Review Couchbase release notes and alerts for vendor-confirmed fixed versions or mitigations.
- Restrict network access to Couchbase services to trusted application and administration hosts.
- Monitor Couchbase and memcached process health for unexpected crashes.
- Prioritize upgrades or vendor guidance for externally reachable Couchbase systems.
Validation and detection
- Inventory Couchbase Server versions across production, staging, and backup environments.
- Confirm whether Couchbase service ports are reachable from untrusted networks.
- Check operational logs for unexplained memcached crashes or restarts.
- Verify remediation against Couchbase release notes or security alerts.
- Document any compensating network controls around affected deployments.
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-2021-35944 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.