CVE-2025-42959
moderate-risk
Published 2025-07-08
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.
Do I need to act?
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0.12% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.1/10
High
NETWORK
/ HIGH complexity
30
/ 100
moderate-risk
Severity
24/34 · High
Exploitability
1/34 · Minimal
Exposure
5/34 · Minimal