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CVE-2020-17441

31
FAUCET Score

CVE-2020-17441 is a critical vulnerability in picoTCP 1.7.0, affecting products like Altran and Microchip MPLAB Harmony. It stems from improper validation of IPv6 payload length, leading to an out-of-bounds read during ICMPv6 checksum calculation. This can result in Denial-of-Service or Information Disclosure. With a CVSS score of 9.1, it is remotely exploitable with low attack complexity and no user interaction required. While there is no known active exploitation or public exploit code, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.7.0CPE matchmatch criteria
cpe:2.3:a:altran:picotcp:*:*:*:*:*:*:*:*
>= 3.0.0, < 3.7.0CPE matchmatch criteria
cpe:2.3:a:microchip:mplab_harmony:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
7.11%
Probability of exploitation in next 30 days
EPSS Percentile
93.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0711 is in the 89th 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