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CVE-2020-25112

43
FAUCET Score

CVE-2020-25112 is a critical vulnerability affecting the IPv6 stack in Contiki OS through version 3.0, stemming from inconsistent checks for IPv6 header extension lengths. This flaw allows for Denial-of-Service and potential Remote Code Execution through specially crafted ICMPv6 echo packets, carrying a CVSS score of 9.8. Despite its high severity and potential for remote exploitation with low complexity, there is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), and it has not been added to CISA's KEV catalog. Furthermore, the vulnerability has garnered minimal community discussion or media coverage, suggesting a low profile despite its critical impact.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.0CPE matchmatch criteria
cpe:2.3:o:contiki-os:contiki-os:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
26.83%
Probability of exploitation in next 30 days
EPSS Percentile
97.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.2683 is in the 95th percentile among its peer group of 36,862 CVEs.

Social Chatter

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

No media coverage found for this CVE.

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

us-cert.cisa.gov / ics/advisories/icsa-20-343-01
Third Party AdvisoryUS Government Resource
kb.cert.org / vuls/id/815128
Third Party AdvisoryUS Government Resource