CVE-2020-7860

Code execution via malformed archive integer overflow

Published Jun 11, 2021 · Updated Sep 16, 2024

Integer overflow in ESTsoft UnEGG 0.5 before 1.0 on Linux allows attackers to execute arbitrary code via a malformed archive. The published advisory identifies malformed-file handling as the trigger but does not disclose the parser locus or overflowing arithmetic operation. Exploitation requires a user to open an attacker-supplied file, after which code executes in the affected process context.

CVSS severity7.8
High
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in ESTsoft UnEGG 0.5 before 1.0 on Linux allows attackers to execute arbitrary code via a malformed archive. The published advisory identifies malformed-file handling as the trigger but does not disclose the parser locus or overflowing arithmetic operation. Exploitation requires a user to open an attacker-supplied file, after which code executes in the affected process context.

The record

CVE
CVE-2020-7860
Published
Jun 11, 2021
Updated
Sep 16, 2024
Vendor
ESTsoft
Product
UnEGG
Classifications
CWE-190, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.5 <1.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

ESTsoft · UnEGGversion=0.5 <1.0

Published CVSS scores

7.8KrCERT/CCCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV: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.

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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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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