9.1

CVE-2020-11909: treck tcp\/ip Integer Underflow (Wrap or Wraparound)

CVSS: 9.1v3.1CriticalModified
Published 17-06-2020Last modified 30-09-2025
Open JSON

Vulnerability summary

CVE-2020-11909 is a critical (CVSS 9.1) Integer Underflow (Wrap or Wraparound) vulnerability in treck tcp\/ip. EPSS estimates a 3.59% chance of exploitation in the next 30 days, higher than 89.2% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)
EPSS score
3.59%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 17-06-2020
    PublishedVulnerability first disclosed.
  2. 30-09-2025
    Last modifiedVulnerability information updated.

Description

The Treck TCP/IP stack before 6.0.1.66 has an IPv4 Integer Underflow.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

3.59%

Chance of exploitation in the next 30 days

Percentile

89%

Versus all other CVEs

30-day change

0.00 pp

From 3.59% on 19-09-2026

19-09-202619-10-2026
EPSS score
3.59%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (jsof-tech.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Treck1 product

1 vendor · 1 product

References

9 links