CVE-2021-26461

Nuttx vulnerability

CVSS

9.8

EPSS

5.0%

EPSS pct

91th

Exploited

No known

Apache Nuttx Versions prior to 10.1.0 are vulnerable to integer wrap-around in functions malloc, realloc and memalign. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

Affected vendor

Apache

Affected product

Nuttx

CVSS vector

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

Weakness type (CWE)

CWE-190 — Integer Overflow or Wraparound

Published

2021-06-21

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 5.0% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 91% of all scored CVEs.

Check your external exposure to CVE-2021-26461

Confirm whether Apache Nuttx is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2021-26461.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-26461

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-26461 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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