CVE-2020-11899
Published: March 3, 2022
Official Description
The Treck TCP/IP stack contains an IPv6 out-of-bounds read vulnerability.
CISA KEV Advisory
Treck TCP/IP stack Out-of-Bounds Read Vulnerability
The Treck TCP/IP stack contains an IPv6 out-of-bounds read vulnerability.
Apply updates per vendor instructions.
Risk Analysis
This CVE pertains to an IPv6 out-of-bounds read vulnerability within the Treck TCP/IP stack. Such flaws can lead to information disclosure or potentially more severe impacts. The high EPSS score of 0.33250 and its inclusion in CISA's KEV catalog indicate a significant and confirmed exploitation risk.
This vulnerability is being actively exploited in the wild and is listed in CISA's KEV catalog, confirming its active use by threat actors. Given it's an IPv6 vulnerability in a TCP/IP stack, it is likely remotely exploitable.
Organizations should identify all devices utilizing the Treck TCP/IP stack and apply vendor-provided patches or updates. Network segmentation and filtering of IPv6 traffic can also help reduce exposure.
Technical Analysis
CVE-2020-11899 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2020-11899 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-11899 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1