How severe is CVE-2017-12858?

CVE-2017-12858 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-12858 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-12858?

CVE-2017-12858 affects Libzip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-12858?

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-2017-12858 published?

CVE-2017-12858 was published on 2017-08-23 and last updated on 2026-06-17.

CVE-2017-12858

CVE-2017-12858 is a critical-severity vulnerability in Libzip with a CVSS 3.x base score of 9.8. 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-415.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-415
Affected product: Libzip
Published: 2017-08-23
Last modified: 2026-06-17

Description

Double free vulnerability in the _zip_dirent_read function in zip_dirent.c in libzip allows attackers to have unspecified impact via unknown vectors.

Frequently asked questions

What is CVE-2017-12858?: Double free vulnerability in the _zip_dirent_read function in zip_dirent.c in libzip allows attackers to have unspecified impact via unknown vectors.
How severe is CVE-2017-12858?: CVE-2017-12858 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-12858 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-12858?: CVE-2017-12858 affects Libzip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-12858?: 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-2017-12858 published?: CVE-2017-12858 was published on 2017-08-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:libzip:libzip:1.2.0:*:*:*:*:*:*:*

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CVE-2019-17582 — Critical (CVSS 9.8): A use-after-free in the _zip_dirent_read function of zip_dirent.c in libzip 1.2.0 allows attackers to have an…
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