CVE-2020-27297
CVE-2020-27297 is a critical-severity vulnerability in Honeywell Opc Ua Tunneller with a CVSS 3.x base score of 9.8. 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-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 2% (82nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Honeywell Opc Ua Tunneller
- Published:
- Last modified:
Description
The affected product is vulnerable to a heap-based buffer overflow, which may allow an attacker to manipulate memory with controlled values and remotely execute code on the OPC UA Tunneller (versions prior to 6.3.0.8233).
Frequently asked questions
- What is CVE-2020-27297?
- The affected product is vulnerable to a heap-based buffer overflow, which may allow an attacker to manipulate memory with controlled values and remotely execute code on the OPC UA Tunneller (versions prior to 6.3.0.8233).
- How severe is CVE-2020-27297?
- CVE-2020-27297 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-27297 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-27297?
- CVE-2020-27297 affects Honeywell Opc Ua Tunneller. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-27297?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2020-27297 published?
- CVE-2020-27297 was published on 2021-01-26 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:honeywell:opc_ua_tunneller:*:*:*:*:*:*:*:*
More vulnerabilities in Honeywell Opc Ua Tunneller
- CVE-2020-27299 — Critical (CVSS 9.1): The affected product is vulnerable to an out-of-bounds read, which may allow an attacker to obtain and disclose…
- CVE-2020-27295 — High (CVSS 7.5): The affected product has uncontrolled resource consumption issues, which may allow an attacker to cause a…
- CVE-2020-27274 — High (CVSS 7.5): Some parsing functions in the affected product do not check the return value of malloc and the thread handling the…
All CVEs affecting Honeywell Opc Ua Tunneller →
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