How severe is CVE-2025-53817?

CVE-2025-53817 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-2025-53817 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-53817?

CVE-2025-53817 affects 7-zip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-53817?

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.

Does CVE-2025-53817 have an EU (EUVD) identifier?

Yes. CVE-2025-53817 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21790.

When was CVE-2025-53817 published?

CVE-2025-53817 was published on 2025-07-17 and last updated on 2026-06-17.

CVE-2025-53817

CVE-2025-53817 is a high-severity vulnerability in 7-zip 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 v4: 5.5
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-21790
Weakness: CWE-476
Affected product: 7-zip
Published: 2025-07-17
Last modified: 2026-06-17

Description

7-Zip is a file archiver with a high compression ratio. 7-Zip supports extracting from Compound Documents. Prior to version 25.0.0, a null pointer dereference in the Compound handler may lead to denial of service. Version 25.0.0 contains a fix cor the issue.

Frequently asked questions

What is CVE-2025-53817?: 7-Zip is a file archiver with a high compression ratio. 7-Zip supports extracting from Compound Documents. Prior to version 25.0.0, a null pointer dereference in the Compound handler may lead to denial of service. Version 25.0.0 contains a fix cor the issue.
How severe is CVE-2025-53817?: CVE-2025-53817 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-2025-53817 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-53817?: CVE-2025-53817 affects 7-zip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-53817?: 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.
Does CVE-2025-53817 have an EU (EUVD) identifier?: Yes. CVE-2025-53817 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21790.
When was CVE-2025-53817 published?: CVE-2025-53817 was published on 2025-07-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:7-zip:7-zip:*:*:*:*:*:*:*:*

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