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CVE-2020-11897

28
FAUCET Score

CVE-2020-11897 is a critical out-of-bounds write vulnerability affecting the Treck TCP/IP stack, specifically versions prior to 5.0.1.35. This flaw can be triggered by multiple malformed IPv6 packets, allowing an unauthenticated attacker to achieve complete compromise of confidentiality, integrity, and availability of affected devices. While it has a CVSS score of 10.0, indicating maximum severity and ease of exploitation, there is currently no public exploit code available, nor is it listed on the CISA KEV catalog. Despite the lack of active exploitation, the vulnerability has garnered significant community attention and media coverage, highlighting its potential impact on IoT devices across various industries.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.0.1.35CPE matchmatch criteria
cpe:2.3:a:treck:tcp\/ip:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

10.0CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
9.14%
Probability of exploitation in next 30 days
EPSS Percentile
94.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0914 is in the 90th percentile among its peer group of 36,862 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jsof-tech.com / vulnerability-disclosure-policy
Third Party Advisory
tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-treck-ip-stack-JyBQ5GyC
Third Party Advisory
dell.com / support/article/de-de/sln321836/dell-response-to-the-ripple20-vulnerabilities
jsof-tech.com / ripple20
Third Party Advisory
kb.cert.org / vuls/id/257161
kb.cert.org / vuls/id/257161
MitigationThird Party AdvisoryUS Government Resource
treck.com
ProductVendor Advisory
arubanetworks.com / assets/alert/ARUBA-PSA-2020-006.txt