How severe is CVE-2018-20253?

CVE-2018-20253 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-20253 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20253?

CVE-2018-20253 affects Rarlab Winrar. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20253?

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-2018-20253 published?

CVE-2018-20253 was published on 2019-02-13 and last updated on 2026-06-17.

CVE-2018-20253

CVE-2018-20253 is a high-severity vulnerability in Rarlab Winrar with a CVSS 3.x base score of 7.8. 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Rarlab Winrar
Published: 2019-02-13
Last modified: 2026-06-17

Description

In WinRAR versions prior to and including 5.60, There is an out-of-bounds write vulnerability during parsing of a crafted LHA / LZH archive formats. Successful exploitation could lead to arbitrary code execution in the context of the current user.

Frequently asked questions

What is CVE-2018-20253?: In WinRAR versions prior to and including 5.60, There is an out-of-bounds write vulnerability during parsing of a crafted LHA / LZH archive formats. Successful exploitation could lead to arbitrary code execution in the context of the current user.
How severe is CVE-2018-20253?: CVE-2018-20253 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-20253 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20253?: CVE-2018-20253 affects Rarlab Winrar. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20253?: 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-2018-20253 published?: CVE-2018-20253 was published on 2019-02-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:rarlab:winrar:*:*:*:*:*:*:*:*

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