How severe is CVE-2020-36561?

CVE-2020-36561 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2020-36561 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-36561?

CVE-2020-36561 affects Unzip Project Unzip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-36561?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-36561 published?

CVE-2020-36561 was published on 2022-12-27 and last updated on 2026-06-17.

CVE-2020-36561

CVE-2020-36561 is a critical-severity vulnerability in Unzip Project Unzip with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Unzip Project Unzip
Published: 2022-12-27
Last modified: 2026-06-17

Description

Due to improper path sanitization, archives containing relative file paths can cause files to be written (or overwritten) outside of the target directory.

Frequently asked questions

What is CVE-2020-36561?: Due to improper path sanitization, archives containing relative file paths can cause files to be written (or overwritten) outside of the target directory.
How severe is CVE-2020-36561?: CVE-2020-36561 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2020-36561 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-36561?: CVE-2020-36561 affects Unzip Project Unzip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-36561?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-36561 published?: CVE-2020-36561 was published on 2022-12-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:unzip_project:unzip:*:*:*:*:*:go:*:*

More vulnerabilities in Unzip Project Unzip

CVE-2008-0888 — Critical (CVSS 9.3): The NEEDBITS macro in the inflate_dynamic function in inflate.c for unzip can be invoked using invalid buffers, which…
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CVE-2014-8140 — High (CVSS 7.8): Heap-based buffer overflow in the test_compr_eb function in Info-ZIP UnZip 6.0 and earlier allows remote attackers to…
CVE-2014-8139 — High (CVSS 7.8): Heap-based buffer overflow in the CRC32 verification in Info-ZIP UnZip 6.0 and earlier allows remote attackers to…
CVE-2018-1000035 — High (CVSS 7.8): A heap-based buffer overflow exists in Info-Zip UnZip version <= 6.00 in the processing of password-protected archives…
CVE-2015-7696 — Medium (CVSS 6.8): Info-ZIP UnZip 6.0 allows remote attackers to cause a denial of service (heap-based buffer over-read and application…

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