Security readout for executives and security teams
Plain-English summary
CVE-2020-11899 affects the Treck TCP/IP stack, software embedded in many networked products. A flawed IPv6 handling path can read memory outside expected bounds. The score is medium, but CISA KEV status raises urgency because exploitation is known, and embedded supply-chain exposure can be hard to inventory.
Executive priority
Treat this as high priority for asset owners managing embedded, network, IoT, or operational technology devices. The business risk is less about one web server and more about hidden supply-chain exposure across appliances with slow patch cycles and known exploitation status.
Technical view
The issue is a CWE-125 out-of-bounds read in the Treck TCP/IP stack before 6.0.1.66. CVSS 3.1 is 5.4 with adjacent-network attack vector, low complexity, no privileges, and no user interaction. Recorded impacts are low integrity and availability impact, with no confidentiality impact in the supplied vector.
Likely exposure
Exposure is most likely in products embedding Treck TCP/IP stack versions before 6.0.1.66, especially IPv6-enabled network, IoT, industrial, or appliance devices. The bundle does not provide concrete CPEs, so confirm exposure through vendor advisories, SBOMs, firmware notes, or supplier attestations.
Exploitation context
The source bundle marks this CVE as CISA KEV and includes the CISA KEV catalog link, supporting known exploitation. The supplied sources do not describe exploitation volume, targeted sectors, or technical exploitation details, so those points should not be assumed.
Researcher notes
Do not rely on the generic affected field, which lists vendor and product as n/a. Use the Treck version threshold, Ripple20 context, and vendor advisories to scope exposure. Evidence supports known exploitation via KEV, but the bundle lacks exploit mechanics and product-specific fix details.
Mitigation direction
- Prioritize assets from vendors with Treck/Ripple20 advisories, including Cisco, Intel, Aruba, NetApp, and Dell.
- Check vendor firmware or product advisories for fixed releases or compensating controls.
- Upgrade embedded Treck TCP/IP stack usage to version 6.0.1.66 or later where directly managed.
- Restrict adjacent-network access to IPv6-capable management and device interfaces where feasible.
- Disable unused IPv6 exposure only when vendor guidance confirms it is safe.
Validation and detection
- Inventory products and firmware that include Treck TCP/IP stack or Ripple20 advisories.
- Compare firmware versions against each vendor’s CVE-2020-11899 guidance.
- Confirm whether IPv6 is enabled on potentially affected interfaces.
- Review network segmentation for adjacent access to affected devices.
- Track CISA KEV remediation deadlines if the organization is subject to BOD 22-01.
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-2020-11899 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
- Medium
- CVSS
- 5.4 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
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:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L2.82.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://cwe.mitre.org/data/definitions/125.htmlCVE reference · x_refsource_MISC
- VU#257161CVE reference · x_refsource_MISC, third-party-advisory
- https://www.treck.com/CVE reference · x_refsource_MISC
- https://jsof-tech.com/vulnerability-disclosure-policy/CVE reference · x_refsource_MISC
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00295.htmlCVE reference · x_refsource_CONFIRM
- https://www.jsof-tech.com/ripple20/CVE reference · x_refsource_MISC
- 20200617 Multiple Vulnerabilities in Treck IP Stack Affecting Cisco Products: June 2020CVE reference · vendor-advisory, x_refsource_CISCO
- https://security.netapp.com/advisory/ntap-20200625-0006/CVE reference · x_refsource_CONFIRM
- https://www.dell.com/support/article/de-de/sln321836/dell-response-to-the-ripple20-vulnerabilitiesCVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-11899CVE 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.
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.