CVE-2020-9264

Virus-detection bypass via manipulated ZIP compression field

Published Feb 18, 2020 · Updated Aug 4, 2024

Virus-detection bypass in ESET Archive Support Module before 1296 allows context-dependent attackers to conceal content in crafted ZIP archives. The archive parser accepts a manipulated Compression Information field that prevents antivirus inspection while the archive remains accessible to an end user. Successful exploitation requires the archive to reach an ESET scanning path and then be opened or processed elsewhere, allowing concealed content to pass with a clean rating.

CVSS severity5.5
Medium
EPSS probability1.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Virus-detection bypass in ESET Archive Support Module before 1296 allows context-dependent attackers to conceal content in crafted ZIP archives. The archive parser accepts a manipulated Compression Information field that prevents antivirus inspection while the archive remains accessible to an end user. Successful exploitation requires the archive to reach an ESET scanning path and then be opened or processed elsewhere, allowing concealed content to pass with a clean rating.

The record

CVE
CVE-2020-9264
Published
Feb 18, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-436, T1027
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 18, 2020CVE 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 vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-436Interpretation Conflict
T1027Obfuscated Files or Information

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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