CVE-2026-45445: AES-OCB IV Ignored on EVP_Cipher() Path
CSIRTS triage
- What
- The AES-OCB IV is ignored on the EVP_Cipher() path, leading to potential security issues.
- Who is affected
- Users of affected cryptographic implementations are at risk.
- Urgency
- High urgency for remediation due to a CVSS score of 7.5 and potential impact.
- Action
- Update cryptographic libraries to the latest version to address this issue.
AI-assisted analysis generated from the source advisory — verify against the original.
Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45445
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-454450.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-45445 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[UPDATE] [high] OpenSSL: Multiple Vulnerabilitiescert-bund
- unknownMultiple vulnerabilities in Tenable Identity Exposure (June 24, 2026)cert-fr-avis
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