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CVE-2020-17528

23
FAUCET Score

CVE-2020-17528 is a critical out-of-bounds write vulnerability affecting the TCP stack of Apache NuttX versions up to and including 9.1.0 and 10.0.0. An unauthenticated attacker can exploit this by sending specially crafted TCP packets with arbitrary urgent data pointer offsets, leading to memory corruption. With a CVSS score of 9.1, this vulnerability poses a high risk for confidentiality and availability. There is currently no public exploit code available, and it is not known to be actively exploited. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
<= 9.1.0CPE matchmatch criteria
cpe:2.3:a:apache:nuttx:*:*:*:*:*:*:*:*
10.0.0CPE matchmatch criteria
cpe:2.3:a:apache:nuttx:10.0.0:*:*:*:*:*:*:*

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
3.13%
Probability of exploitation in next 30 days
EPSS Percentile
86.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0313 is in the 78th percentile among its peer group of 36,833 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

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

lists.apache.org / thread.html/r7f4215aba288660b41b7e731b6262c8275fa476e91e527a74d2888ea%40%3Cdev.nuttx.apache.org%3E
Mailing ListVendor Advisory
openwall.com / lists/oss-security/2020/12/09/4
Mailing ListThird Party Advisory