CVE-2020-24175Public exploit

Code execution via unchecked filename formatting

Published Feb 22, 2021 · Updated Jul 9, 2026

Buffer overflow in Yz1 0.30 and 0.32 allows attackers to execute arbitrary code through a crafted archive file. During archive decoding, unchecked sprintf calls format attacker-controlled filenames into fixed-size stack buffers, overwriting stack state. Exploitation requires a victim to open or extract the crafted archive in an affected archiver; successful exploitation can execute code with that process's privileges.

CVSS severity7.8
High
EPSS probability1.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Yz1 0.30 and 0.32 allows attackers to execute arbitrary code through a crafted archive file. During archive decoding, unchecked sprintf calls format attacker-controlled filenames into fixed-size stack buffers, overwriting stack state. Exploitation requires a victim to open or extract the crafted archive in an affected archiver; successful exploitation can execute code with that process's privileges.

The record

CVE
CVE-2020-24175
Published
Feb 22, 2021
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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

7.8NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NVDAV:N/AC:M/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

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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