Indicator investigation
Loading the current evidence view. Navigation and account controls remain available.
Loading verdict, provenance, relationships and sightings.
Indicator
Type cve · source NVD CVE
HIGH SEVERITY (CVSS 8.8)
Vulnerability investigation
The available snapshot does not list this vulnerability in CISA KEV; that is not proof exploitation has not occurred. NVD rates the technical severity high at CVSS 8.8. These are public vulnerability signals, not proof that a specific environment runs an affected version.
Exploitation status
No KEV listing in available snapshot
Absence from KEV does not establish absence of exploitation.
30-day exploitation likelihood
Unavailable
FIRST EPSS did not return a score.
Technical severity
8.8 · high
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected surface
2 parsed products
Openssl Openssl, Openssl Openssl 4.0.0
Weakness class
CWE-416: Use After Free, CWE-825
CWE describes the weakness category, not whether a deployed product is reachable or exploitable.
Corpus evidence
1 connectors · 28 citations
No related report text is available in the local corpus.
Findings stay bounded to named sources and observable infrastructure.
Issue summary: A specially crafted PKCS#7 or S/MIME signed message could trigger a use-after-free during PKCS#7 signature verification. Impact summary: A use-after-free may result in process crashes, heap corruption, or potentially remote code execution. When processing a PKCS#7 or S/MIME signed message, if the SignedData digestAlgorithms field is present as an empty ASN.1 SET, OpenSSL may incorrectly free a caller-owned BIO during PKCS7_verify(). A subsequent use of the BIO by the calling application results in a use-after-free condition. In the common case this occurs when the application later calls BIO_free() on the BIO originally passed to PKCS7_verify(). Depending on allocator behavior and application-specific BIO usage patterns, this may result in a crash or other memory corruption. In some application contexts this may potentially be exploitable for remote code execution. Applications that process PKCS#7 or S/MIME signed messages using OpenSSL PKCS#7 APIs may be affected. Applications using the CMS APIs for this processing are not affected. The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.
The base CVE appears first. Independent evidence is added without blocking the page.
Investigation status
Checking for newly completed evidence
NIST NVD
NVD evidence is available in this response
CISA KEV
Known-exploitation catalog check is pending
FIRST EPSS
Forensia does not request or publish EPSS while source rights are under review
Reports
Report links are still being resolved
Relationships
Product and vulnerability relationships are still being prepared
Local EPSS row, KEV flag, and catalog notes from stored metadata only.
Vendor/product strings parsed from local CPE URIs (no inferred ATT&CK).
| Product | CPE (truncated) |
|---|---|
| Openssl Openssl 4.0.0 | cpe:2.3:a:openssl:openssl:4.0.0:-:*:*:*:*:*:* |
| Openssl Openssl | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
Neighborhood topology. Open the graph for interactive pivots.
Loading connected indicators, reports and entities.
High-signal pivots without leaving the thread you started in search.
Structured pivots from local graph context.
Full investigation canvas with neighbor expansion.