CVE-2021-29997Network attack vector

IKE service interruption via buffer over-read

Published Apr 13, 2021 · Updated Aug 3, 2024

Out-of-bounds read in IKE in Wind River VxWorks 7 before 21.03 allows remote attackers to stop IKE-dependent services via a crafted packet. Public records identify the locus only as IKE: a malformed packet causes the implementation to read beyond a buffer boundary, but no function or field is disclosed. No authentication or user interaction is required, and the reported consequence is limited to interruption of IKE and services that depend on it.

CVSS severity5.3
Medium
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in IKE in Wind River VxWorks 7 before 21.03 allows remote attackers to stop IKE-dependent services via a crafted packet. Public records identify the locus only as IKE: a malformed packet causes the implementation to read beyond a buffer boundary, but no function or field is disclosed. No authentication or user interaction is required, and the reported consequence is limited to interruption of IKE and services that depend on it.

The record

CVE
CVE-2021-29997
Published
Apr 13, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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