Is CVE-2022-21676 in the CISA KEV catalog?

No. CVE-2022-21676 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-21676?

CVE-2022-21676 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2022-21676?

CVE-2022-21676 has an EPSS score of 2.76% (84th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-21676?

Upgrade engine.io to 6.1.1 or later.

CVE & CISA-KEV Catalog

CVE-2022-21676

HIGHEPSS 84th pctl

7.5

CVSS v3

NVD

Description

Engine.IO is the implementation of transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO. A specially crafted HTTP request can trigger an uncaught exception on the Engine.IO server, thus killing the Node.js process. This impacts all the users of the `engine.io` package starting from version `4.0.0`, including those who uses depending packages like `socket.io`. Versions prior to `4.0.0` are not impacted. A fix has been released for each major branch, namely `4.1.2` for the `4.x.x` branch, `5.2.1` for the `5.x.x` branch, and `6.1.1` for the `6.x.x` branch. There is no known workaround except upgrading to a safe version.

CWE-754 CWE-755

How to fix

Remediation Available

engine.ioNVD

Affected:>= 6.0.0, < 6.1.1Fixed in:6.1.1CVE-2022-21676derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

2.76%probability of exploitation in 30 days

84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

Patch3

Third-Party Advisory5

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.