CVE-2020-11896
The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.
Affects 2 products across 4 vendors.
Parent class for buffer-related vulnerabilities where operations exceed buffer boundaries.
Software writes data past buffer boundaries, corrupting memory and potentially enabling code execution.
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Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.
The Treck TCP/IP stack before 6.0.1.66 is vulnerable to Remote Code Execution due to an issue in IPv4 tunneling. This vulnerability has a CVSS score of 10.0, indicating critical severity. Affected vendors include Fujitsu-Siemens, Schneider-Electric, Siemens, Treck, and Wolfram Schneider. A public proof of concept exists, but no known exploits are currently available.
BSID: BS-2020-GLOBAL-234007-C • Model: Qwen/Qwen2.5-72B-Instruct-AWQ • Confidence: HIGH
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| CVE ID | CVE-2020-11896 |
|---|---|
| BSID | BS-2020-GLOBAL-234007-C BreachSpider Global ID |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| Published | 2020-06-17 |
| Last Modified | 2024-11-21 |
| ICS Relevance | 70% |
| Weakness (CWE) | |
| Verticals | |
| Source | NVD |
The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.
Source: NIST NVD / MITRE CVE Database
The vulnerability arises from improper handling of IPv4 tunneling packets in the Treck TCP/IP stack. An attacker can send specially crafted packets to trigger remote code execution on the target system. This can lead to complete compromise of the affected device, potentially allowing the attacker to execute arbitrary code with full privileges.
Exploitation Likelihood: HIGH
| Vendor | Product | Fixed Version |
|---|---|---|
| Schneider-Electric | — | — |
| Siemens | — | — |
| Treck | Tcp\/Ip | — |
| Treck | Tcp/Ip | — |
| Wolfram Schneider | — | — |
| CISA KEV | Not in KEV catalog |
|---|---|
| Public Exploit | Not confirmed |
| PoC Code | Not confirmed |
Implement network segmentation and apply strict firewall rules to limit access to the affected systems. Monitor network traffic for suspicious activity and apply the latest security patches as soon as they become available.
No reliable network detection signature exists for this vulnerability class — apply the compensating controls above and the vendor patch. SAGE only publishes a network rule when a concrete on-the-wire signature can be grounded in the advisory.
This CVE violates CIP-007-R2 because it allows unauthorized access to electronic security perimeters, which could compromise the integrity and availability of critical assets.
This CVE maps to SR 7.6 because it involves a vulnerability that can be exploited remotely, leading to loss of control over the affected system, which is a critical security concern in ICS environments.
Virtual patch generated by CITED Relevance SAGE. Validate in isolated environment before production deployment. Compensating control only - does not replace vendor patch.
SAGE Enrichment Record — provenance & audit hash
| Model | Qwen/Qwen2.5-72B-Instruct-AWQ |
|---|---|
| Confidence | HIGH |
| Enriched At | 2026-05-24 |
| SHA-512 Audit Hash | d06ba46fd05907895379e3103e7b097f678122fc2162bf1035dd0ee37222f3dd4b4751d3d0233d82594d7a91ad1776f7247263be51277707c709ce3c68e49308 |
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