Analyst readout for executives and security teams
Plain-English summary
This is a serious flaw in device SNMP handling. Anyone who can reach SNMP and has the SNMP community string or credentials could crash the device or take it over. Because CISA lists CVE-2017-6739 in KEV, treat reachable SNMP management planes as urgent.
Executive priority
Prioritize within the next remediation cycle, faster for externally reachable management interfaces. KEV status means this should not remain as technical debt, even though exploitation requires SNMP credentials or community strings.
Technical view
CWE-119 buffer overflow in the SNMP implementation affects SNMPv1, v2c, and v3. An authenticated remote attacker with the read-only community string or SNMPv3 credentials can send a crafted SNMP packet directed at the device, causing reload or arbitrary code execution with full system control. CVSS 3.0 score is 8.8.
Likely exposure
Exposure depends on whether affected systems have SNMP enabled and reachable. Higher-risk cases include SNMP exposed to the internet, shared monitoring networks, weak community-string controls, or stale SNMPv3 credentials. The provided bundle does not enumerate exact affected product versions.
Exploitation context
CISA KEV listing supports known exploitation. The source bundle states exploitation requires SNMP access plus a valid community string or SNMPv3 credentials, and only traffic directed to the affected system can trigger it.
Researcher notes
The bundle confirms authenticated remote attack surface, buffer overflow class, all SNMP versions, and potential RCE or reload. Product/version detail is incomplete in the provided data, so validation should be anchored to the Cisco advisory rather than inferred CPE data.
Mitigation direction
- Check the Cisco advisory for affected releases and fixed software guidance.
- Restrict SNMP to trusted management hosts and networks only.
- Rotate SNMP community strings and review SNMPv3 credentials.
- Disable SNMP where it is not operationally required.
- Prioritize remediation for internet-facing or broadly reachable management planes.
Validation and detection
- Inventory systems with SNMP enabled across all network zones.
- Confirm whether listed systems match the vendor advisory’s affected software guidance.
- Review firewall and ACL rules for SNMP reachability.
- Check SNMP credential exposure and community-string reuse.
- Look for unexpected reloads or SNMP-related security events.
Public sources used
Based on public source material and reviewed before publication.
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-119: 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-2017-6739 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
- 8.8 (3.0)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:L/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.
CISA KEV status
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:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- cisco-sa-20170629-snmpCVE reference
- 99345CVE reference · vdb-entry, x_refsource_BID
- 1038808CVE reference · vdb-entry, x_refsource_SECTRACK
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmpCVE reference · x_refsource_CONFIRM, x_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6739CVE reference · government-resource
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.
Improper Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.