CVE-2025-42959HIGH 8.1EPSS p43.3%
CVE-2025-42959CVE-2025-42959
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.
Scoring
| CVSS 3.1 | 8.1 (HIGH) |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 0.54% probability of exploitation · percentile 43.3% · 2026-10-06T12:00:23Z |
| Published | 2025-07-08 |
| Last modified | 2026-04-15 |
Underlying weaknesses· 1
References
1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Use of Single-factor Authenticationcwe-308 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.