How severe is CVE-2018-20786?

CVE-2018-20786 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-20786 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20786?

CVE-2018-20786 affects Leonerd Libvterm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20786?

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

When was CVE-2018-20786 published?

CVE-2018-20786 was published on 2019-02-24 and last updated on 2026-06-17.

CVE-2018-20786

CVE-2018-20786 is a high-severity vulnerability in Leonerd Libvterm with a CVSS 3.x base score of 7.5. 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-476.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Leonerd Libvterm
Published: 2019-02-24
Last modified: 2026-06-17

Description

libvterm through 0+bzr726, as used in Vim and other products, mishandles certain out-of-memory conditions, leading to a denial of service (application crash), related to screen.c, state.c, and vterm.c.

Frequently asked questions

What is CVE-2018-20786?: libvterm through 0+bzr726, as used in Vim and other products, mishandles certain out-of-memory conditions, leading to a denial of service (application crash), related to screen.c, state.c, and vterm.c.
How severe is CVE-2018-20786?: CVE-2018-20786 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-20786 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20786?: CVE-2018-20786 affects Leonerd Libvterm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20786?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-20786 published?: CVE-2018-20786 was published on 2019-02-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:leonerd:libvterm:*:*:*:*:*:*:*:*

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