Security readout for executives and security teams
Plain-English summary
CVE-2017-2892 is a critical network-facing flaw in Cesanta Mongoose 6.8 MQTT packet parsing. A malicious MQTT packet can cause memory access outside intended bounds, with possible information disclosure, service crash, or remote code execution.
Executive priority
Treat this as high-priority remediation for any reachable Mongoose 6.8 MQTT deployment because the vulnerability is unauthenticated, network-triggerable, and rated critical. Prioritize internet-facing and embedded operational systems first.
Technical view
The issue is an arbitrary out-of-bounds memory read/write in Mongoose 6.8 MQTT parsing. The CVSS 3.0 vector is network, low complexity, no privileges, no user interaction, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely where Cesanta Mongoose 6.8 is embedded in products or services with MQTT parsing reachable over a network. Internet-facing or broadly reachable MQTT endpoints carry the highest concern.
Exploitation context
The sources describe remote triggering by sending a specially crafted MQTT packet. The bundle does not cite CISA KEV listing or any source confirming active exploitation in the wild.
Researcher notes
Evidence names Cesanta Mongoose 6.8 only. No CWE, fixed version, or product-specific downstream list is included in the bundle. KEV is false, so do not claim known active exploitation from these sources.
Mitigation direction
- Identify products or services using Cesanta Mongoose 6.8.
- Check Cesanta and product-vendor guidance for patches or supported upgrade paths.
- Restrict MQTT access to trusted networks or authenticated private paths.
- Block unnecessary external access to affected MQTT services.
- Monitor affected services for crashes, restarts, or anomalous MQTT traffic.
Validation and detection
- Inventory binaries, firmware, and dependencies for Cesanta Mongoose 6.8.
- Confirm whether MQTT parsing is enabled and reachable over the network.
- Review firewall and exposure records for reachable MQTT services.
- Verify vendor patch, upgrade, or compensating-control status for each instance.
- Check security monitoring for suspicious MQTT traffic or unexplained service instability.
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.
Execution 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-2017-2892 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
- Critical
- CVSS
- 9.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
9.8CriticalVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0399CVE 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.