How severe is CVE-2020-18770?

CVE-2020-18770 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-18770 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-18770?

CVE-2020-18770 affects Gdraheim Zziplib. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-18770?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-18770 published?

CVE-2020-18770 was published on 2023-08-22 and last updated on 2026-06-17.

CVE-2020-18770

CVE-2020-18770 is a medium-severity vulnerability in Gdraheim Zziplib with a CVSS 3.x base score of 5.5. 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-400.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Gdraheim Zziplib
Published: 2023-08-22
Last modified: 2026-06-17

Description

An issue was discovered in function zzip_disk_entry_to_file_header in mmapped.c in zziplib 0.13.69, which will lead to a denial-of-service.

Frequently asked questions

What is CVE-2020-18770?: An issue was discovered in function zzip_disk_entry_to_file_header in mmapped.c in zziplib 0.13.69, which will lead to a denial-of-service.
How severe is CVE-2020-18770?: CVE-2020-18770 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-18770 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-18770?: CVE-2020-18770 affects Gdraheim Zziplib. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-18770?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-18770 published?: CVE-2020-18770 was published on 2023-08-22 and last updated on 2026-06-17.

References

https://github.com/gdraheim/zziplib/issues/69

Affected products (1)

cpe:2.3:a:gdraheim:zziplib:0.13.69:*:*:*:*:*:*:*

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