How severe is CVE-2025-3771?

CVE-2025-3771 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2025-3771 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-3771?

CVE-2025-3771 affects Trellix System Information Reporter. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-3771?

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-2025-3771 have an EU (EUVD) identifier?

Yes. CVE-2025-3771 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27856.

When was CVE-2025-3771 published?

CVE-2025-3771 was published on 2025-06-26 and last updated on 2026-06-17.

CVE-2025-3771

CVE-2025-3771 is a high-severity vulnerability in Trellix System Information Reporter with a CVSS 3.x base score of 7.1. 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-59.

Key facts

Severity: High (CVSS 3.x base score 7.1)
CVSS v4: 7.2
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-27856
Weakness: CWE-59
Affected product: Trellix System Information Reporter
Published: 2025-06-26
Last modified: 2026-06-17

Description

A path or symbolic link manipulation vulnerability in SIR 1.0.3 and prior versions allows an authenticated non-admin local user to overwrite system files with SIR backup files, which can potentially cause a system crash. This was achieved by adding a malicious entry to the registry under the Trellix SIR registry folder or via policy or with a junction symbolic link to files that the user would not normally have permission to acces

Frequently asked questions

What is CVE-2025-3771?: A path or symbolic link manipulation vulnerability in SIR 1.0.3 and prior versions allows an authenticated non-admin local user to overwrite system files with SIR backup files, which can potentially cause a system crash. This was achieved by adding a malicious entry to the registry under the Trellix SIR registry folder or via policy or with a junction symbolic link to files that the user would not normally have permission to acces
How severe is CVE-2025-3771?: CVE-2025-3771 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2025-3771 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-3771?: CVE-2025-3771 affects Trellix System Information Reporter. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-3771?: 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-2025-3771 have an EU (EUVD) identifier?: Yes. CVE-2025-3771 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27856.
When was CVE-2025-3771 published?: CVE-2025-3771 was published on 2025-06-26 and last updated on 2026-06-17.

References

https://thrive.trellix.com/s/article/000014635

Affected products (1)

cpe:2.3:a:trellix:system_information_reporter:*:*:*:*:*:*:*:*

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