Security readout for executives and security teams
Plain-English summary
CVE-2020-27336 is a low-severity IPv6 parsing flaw in Treck IPv6 before 6.0.1.68. A remote unauthenticated attacker could send a crafted network packet and cause a very small out-of-bounds read, exposing up to three bytes of memory. The known impact is limited confidentiality exposure.
Executive priority
Treat this as a low-priority remediation item unless affected Treck IPv6 code is present on exposed network infrastructure. The main business need is dependency visibility, not emergency response, because public evidence here supports limited impact and no confirmed active exploitation.
Technical view
The flaw is CWE-125 improper input validation in Treck IPv6 packet handling. CVSS 3.1 is 3.7 with network attack vector, no privileges, no user interaction, high attack complexity, and low confidentiality impact only. No integrity or availability impact is stated in the provided sources.
Likely exposure
Exposure is most likely where Treck IPv6 before 6.0.1.68 is present. The bundle does not provide complete downstream affected product details; it only includes Treck and NetApp advisory references. Organizations should validate embedded or appliance dependencies with their vendors.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation is remote and unauthenticated in theory, but rated high complexity and limited to reading up to three bytes through network access.
Researcher notes
Evidence is incomplete for downstream product scope. The core issue is a small out-of-bounds read in IPv6 input validation, reachable by an unauthenticated remote packet. Avoid assuming affected vendors beyond the cited Treck and NetApp sources without product-specific advisory confirmation.
Mitigation direction
- Upgrade Treck IPv6 to 6.0.1.68 or a vendor-confirmed fixed release.
- Check Treck guidance for official remediation details.
- Check NetApp advisory applicability for NetApp-managed environments.
- Ask downstream vendors whether their products include affected Treck IPv6 code.
- Restrict unnecessary IPv6 exposure where business operations allow.
Validation and detection
- Inventory systems and firmware that include Treck IPv6 components.
- Confirm whether deployed Treck IPv6 versions are before 6.0.1.68.
- Review Treck and NetApp advisories for affected product mapping.
- Prioritize externally reachable IPv6-enabled assets for verification.
- Document vendor responses where product impact is unclear.
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-125: 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 lookupCVE-2020-27336 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
- Low
- CVSS
- 3.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AC:H/AV:N/A:N/C:L/I:N/PR:N/S:U/UI:N
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/AC:H/AV:N/A:N/C:L/I:N/PR:N/S:U/UI:N2.21.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.7LowVector: CVSS:3.1/AC:H/AV:N/A:N/C:L/I:N/PR:N/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://treck.com/vulnerability-response-information/CVE reference · x_refsource_CONFIRM
- https://security.netapp.com/advisory/ntap-20210201-0003/CVE 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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.