CVE-2025-34109

CVE-2025-34109 is a high-severity vulnerability with a CVSS 4.0 base score of 8.5. 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-427.

Key facts

• Severity: High (CVSS 4.0 base score 8.5)
• EPSS exploit prediction: 0% (20th percentile)
• Actively exploited: Not listed in CISA KEV
• EU (EUVD) id: EUVD-2025-21431
• Weakness: CWE-427
• Published: 2025-07-15
• Last modified: 2026-06-17

Description

PSEvents.exe in multiple Panda Security products runs hourly with SYSTEM privileges and loads DLL files from a user-writable directory without proper validation. An attacker with low-privileged access who can write DLL files to the monitored directory can achieve arbitrary code execution with SYSTEM privileges. Affected products include Panda Global Protection 2016, Panda Antivirus Pro 2016, Panda Small Business Protection, and Panda Internet Security 2016 (all versions up to 16.1.2).

Frequently asked questions

What is CVE-2025-34109?

PSEvents.exe in multiple Panda Security products runs hourly with SYSTEM privileges and loads DLL files from a user-writable directory without proper validation. An attacker with low-privileged access who can write DLL files to the monitored directory can achieve arbitrary code execution with SYSTEM privileges. Affected products include Panda Global Protection 2016, Panda Antivirus Pro 2016, Panda Small Business Protection, and Panda Internet Security 2016 (all versions up to 16.1.2).

How severe is CVE-2025-34109?

CVE-2025-34109 has a CVSS 4.0 base score of 8.5, rated high severity.

Is CVE-2025-34109 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-34109?

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-2025-34109 have an EU (EUVD) identifier?

Yes. CVE-2025-34109 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21431.

When was CVE-2025-34109 published?

CVE-2025-34109 was published on 2025-07-15 and last updated on 2026-06-17.

References

• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/local/panda_psevents.rb
• https://web.archive.org/web/20160704105329/http://www.pandasecurity.com/uk/support/card?id=100053
• https://web.archive.org/web/20170415211828/http://www.security-assessment.com/files/documents/advisory/Panda%20Security%20-%20Privilege%20Escalation.pdf
• https://www.exploit-db.com/exploits/40020
• https://www.vulncheck.com/advisories/panda-security-psevents-insecure-dll-loading-privilege-escalation

Other CWE-427 (Uncontrolled Search Path Element) vulnerabilities

• CVE-2025-4981 — Critical (CVSS 9.9): Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to…
• CVE-2025-69599 — Critical (CVSS 9.8): RayVentory Scan Engine through 12.6 Update 8 allows attackers to gain privileges if they control the value of the PATH…
• CVE-2019-25268 — Critical (CVSS 9.8): NREL BEopt 2.8.0.0 contains a DLL hijacking vulnerability that allows attackers to load arbitrary libraries by tricking…
• CVE-2023-53959 — Critical (CVSS 9.8): FileZilla Client 3.63.1 contains a DLL hijacking vulnerability that allows attackers to execute malicious code by…
• CVE-2025-65741 — Critical (CVSS 9.8): Sublime Text 3 Build 3208 or prior for MacOS is vulnerable to Dylib Injection. An attacker could compile a .dylib file…
• CVE-2024-23054 — Critical (CVSS 9.8): An issue in Plone Docker Official Image 5.2.13 (5221) open-source software that could allow for remote code execution…

Browse all CWE-427 (Uncontrolled Search Path Element) vulnerabilities →