CVE-2021-46461Public exploitNetwork attack vector

Process crash via missing DataView type entry

Published Feb 14, 2022 · Updated Aug 4, 2024

Out-of-bounds array access in njs 0.7.0 and earlier allows attackers to crash the interpreter with a crafted DataView typeof operation. The njs_vmcode_typeof function indexes its types table with the DataView type, but the table lacks a corresponding element and supplies an invalid pointer to the return-value copy. The fault requires execution of attacker-controlled njs code and produces a null-address read followed by process abort; the published proof does not demonstrate code execution.

CVSS severity9.8
Critical
EPSS probability3.15%
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 array access in njs 0.7.0 and earlier allows attackers to crash the interpreter with a crafted DataView typeof operation. The njs_vmcode_typeof function indexes its types table with the DataView type, but the table lacks a corresponding element and supplies an invalid pointer to the return-value copy. The fault requires execution of attacker-controlled njs code and produces a null-address read followed by process abort; the published proof does not demonstrate code execution.

The record

CVE
CVE-2021-46461
Published
Feb 14, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-119, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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 exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499.004Application or System Exploitation

Public exploit references

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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