CVE-2023-49321Network attack vector

Remote scanner hang via crafted file processing

Published Nov 26, 2023 · Updated Aug 2, 2024

Denial of service in WithSecure endpoint protection products allows remote attackers to hang the scanner by submitting a crafted file. WithSecure has not disclosed the affected scanner component; processing the malformed file consumes excessive scan time until the engine stops responding. No authentication or user interaction is required, and the documented consequence is interruption of malware scanning rather than data access or modification.

CVSS severity5.3
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in WithSecure endpoint protection products allows remote attackers to hang the scanner by submitting a crafted file. WithSecure has not disclosed the affected scanner component; processing the malformed file consumes excessive scan time until the engine stops responding. No authentication or user interaction is required, and the documented consequence is interruption of malware scanning rather than data access or modification.

The record

CVE
CVE-2023-49321
Published
Nov 26, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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

5.3NIST 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.

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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

T1499Endpoint Denial of Service

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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