Security readout for executives and security teams
Plain-English summary
CVE-2022-3786 is an OpenSSL certificate-validation flaw that can crash affected software during TLS certificate checks. It is most relevant where systems use affected OpenSSL 3.x code and process attacker-controlled certificates. The public evidence supports denial of service risk, not data theft or code execution.
Executive priority
Treat as a high-priority availability risk, especially for services whose outage would affect customers or operations. Patch according to vendor guidance, but avoid emergency assumptions about data compromise unless separate evidence exists.
Technical view
The flaw is a stack buffer overrun in X.509 name constraint checking for certificate email addresses. It occurs after chain signature verification and requires either a malicious CA-signed certificate or verification continuing after path-building failure. Reported impact is availability loss through crash.
Likely exposure
Exposure is likely where OpenSSL 3.0.0 is present in applications, appliances, or embedded products that perform X.509 verification. TLS clients can be affected by malicious servers; TLS servers are relevant when client certificate authentication is enabled.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. Attack feasibility depends on certificate-handling conditions, but the CVSS vector is network, low complexity, no privileges, no user interaction, with high availability impact.
Researcher notes
Important constraints are the name-constraint path, email address handling, and post-signature-verification timing. The sources describe crash-oriented impact. They do not establish active exploitation, broad product scope beyond referenced vendors, or a universal mitigation beyond applying vendor fixes.
Mitigation direction
- Apply OpenSSL and downstream vendor updates tied to CVE-2022-3786.
- Prioritize internet-facing TLS clients and servers using client certificate authentication.
- Check Intel, CERT/CC, Siemens, and other supplier advisories for product-specific fixes.
- Avoid continuing certificate verification after untrusted path construction failures.
- Track remaining affected assets until vendor remediation is confirmed.
Validation and detection
- Inventory OpenSSL versions in hosts, containers, appliances, and bundled applications.
- Confirm whether applications use OpenSSL 3.0.0 for X.509 certificate verification.
- Identify TLS servers that request or require client certificates.
- Review vendor advisories for affected product versions and fixed releases.
- Verify patched builds through package metadata, SBOMs, or vendor release evidence.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-120: Exact CWE lookup
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Open ATT&CK lookupCVE-2022-3786 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- OpenSSL AdvisoryCVE reference · vendor-advisory
- 3.0.7 git commitCVE reference · patch
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00789.htmlCVE reference
- https://www.kb.cert.org/vuls/id/794340CVE reference
- https://cert-portal.siemens.com/productcert/html/ssa-408105.htmlCVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.