How severe is CVE-2025-2516?

CVE-2025-2516 has a CVSS 4.0 base score of 9.5, rated critical severity.

Is CVE-2025-2516 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-2516?

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

Does CVE-2025-2516 have an EU (EUVD) identifier?

Yes. CVE-2025-2516 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8443.

When was CVE-2025-2516 published?

CVE-2025-2516 was published on 2025-03-27 and last updated on 2026-06-17.

CVE-2025-2516

CVE-2025-2516 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.5. 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-326.

Key facts

Severity: Critical (CVSS 4.0 base score 9.5)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-8443
Weakness: CWE-326
Published: 2025-03-27
Last modified: 2026-06-17

Description

The use of a weak cryptographic key pair in the signature verification process in WPS Office (Kingsoft) on Windows allows an attacker who successfully recovered the private key to sign components. As older versions of WPS Office did not validate the update server's certificate, an Adversary-In-The-Middle attack was possible allowing updates to be hijacked.

Frequently asked questions

What is CVE-2025-2516?: The use of a weak cryptographic key pair in the signature verification process in WPS Office (Kingsoft) on Windows allows an attacker who successfully recovered the private key to sign components. As older versions of WPS Office did not validate the update server's certificate, an Adversary-In-The-Middle attack was possible allowing updates to be hijacked.
How severe is CVE-2025-2516?: CVE-2025-2516 has a CVSS 4.0 base score of 9.5, rated critical severity.
Is CVE-2025-2516 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-2516?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-2516 have an EU (EUVD) identifier?: Yes. CVE-2025-2516 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8443.
When was CVE-2025-2516 published?: CVE-2025-2516 was published on 2025-03-27 and last updated on 2026-06-17.

References

https://www.welivesecurity.com/en/eset-research/nspx30-sophisticated-aitm-enabled-implant-evolving-since-2005/

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