CVE-2018-12087
CVE-2018-12087 is a medium-severity vulnerability in Opcfoundation Ua-.net-legacy with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- CVSS v2: 2.1
- EPSS exploit prediction: 0% (20th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-295
- Affected product: Opcfoundation Ua-.net-legacy
- Published:
- Last modified:
Description
Failure to validate certificates in OPC Foundation UA Client Applications communicating without security allows attackers with control over a piece of network infrastructure to decrypt passwords.
Frequently asked questions
- What is CVE-2018-12087?
- Failure to validate certificates in OPC Foundation UA Client Applications communicating without security allows attackers with control over a piece of network infrastructure to decrypt passwords.
- How severe is CVE-2018-12087?
- CVE-2018-12087 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2018-12087 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-12087?
- CVE-2018-12087 primarily affects Opcfoundation Ua-.net-legacy. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2018-12087?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2018-12087 published?
- CVE-2018-12087 was published on 2018-10-03 and last updated on 2026-06-17.
References
Affected products (2)
- cpe:2.3:a:opcfoundation:ua-.net-legacy:*:*:*:*:*:*:*:*
- cpe:2.3:a:opcfoundation:ua-.netstandard:*:*:*:*:*:*:*:*
More vulnerabilities in Opcfoundation Ua-.net-legacy
- CVE-2017-12070 — High (CVSS 8.8): Unsigned versions of the DLLs distributed by the OPC Foundation may be replaced with malicious code.
- CVE-2018-12585 — High (CVSS 8.2): An XXE vulnerability in the OPC UA Java and .NET Legacy Stack can allow remote attackers to trigger a denial of service.
- CVE-2021-27432 — High (CVSS 7.5): OPC Foundation UA .NET Standard versions prior to 1.4.365.48 and OPC UA .NET Legacy are vulnerable to an uncontrolled…
- CVE-2018-7559 — Medium (CVSS 5.3): An issue was discovered in OPC UA .NET Standard Stack and Sample Code before GitHub commit 2018-04-12, and OPC UA .NET…
All CVEs affecting Opcfoundation Ua-.net-legacy →
Other CWE-295 (Improper Certificate Validation) vulnerabilities
- CVE-2026-4370 — Critical (CVSS 10.0): A vulnerability was identified in Juju from version 3.2.0 until 3.6.19 and from version 4.0 until 4.0.4, where the…
- CVE-2026-30836 — Critical (CVSS 10.0): Step CA is an online certificate authority for secure, automated certificate management for DevOps. Versions 0.30.0-rc6…
- CVE-2025-68121 — Critical (CVSS 10.0): During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between…
- CVE-2022-20703 — Critical (CVSS 10.0): Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an attacker…
- CVE-2021-1471 — Critical (CVSS 9.9): Multiple vulnerabilities in Cisco Jabber for Windows, Cisco Jabber for MacOS, and Cisco Jabber for mobile platforms…
- CVE-2026-20184 — Critical (CVSS 9.8): A vulnerability in the integration of single sign-on (SSO) with Control Hub in Cisco Webex Services could have allowed…
Browse all CWE-295 (Improper Certificate Validation) vulnerabilities →