Is CVE-2025-42959 in the CISA KEV catalog?

No. CVE-2025-42959 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-42959?

CVE-2025-42959 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2025-42959?

CVE-2025-42959 has an EPSS score of 0.49% (39th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2025-42959?

No published fix for CVE-2025-42959 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2025-42959

HIGH

8.1

CVSS v3

NVD

Description

An unauthenticated attacker may exploit a scenario where a Hashed Message Authentication Code (HMAC) credential, extracted from a system missing specific security patches, is reused in a replay attack against a different system. Even if the target system is fully patched, successful exploitation could result in complete system compromise, affecting confidentiality, integrity, and availability.

CWE-308

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

TridentStack Control tracks known vulnerabilities across your Windows, macOS, and Linux fleet and shows the fix as soon as one is published. See how it works

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.49%probability of exploitation in 30 days

39thpercentile

Low risk: more likely to be exploited than 39% of all known CVEs.

References

Other references2

Related Vulnerabilities

Other CWE-308 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-49075	High	8.4	1.4%	-	Fix
CVE-2023-25681	Medium	5.3	0.6%	-	-
CVE-2023-50934	Medium	5.3	0.4%	-	-
CVE-2024-47652	High	8.1	0.4%	-	Fix
CVE-2023-34228	Medium	5.3	0.4%	-	Fix
CVE-2025-64103	Critical	9.8	0.3%	-	Fix

Embed a live status badge for CVE-2025-42959

Markdown

[![CVE-2025-42959](https://tridentstack.com/cve/badge/CVE-2025-42959.svg)](https://tridentstack.com/cve/CVE-2025-42959)

HTML

<a href="https://tridentstack.com/cve/CVE-2025-42959"><img src="https://tridentstack.com/cve/badge/CVE-2025-42959.svg" alt="CVE-2025-42959"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-07-08.