CVE-2021-27498
CVE-2021-27498 is a high-severity vulnerability in Opener Project Opener with a CVSS 3.x base score of 7.5. 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-617.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (65th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-617
- Affected product: Opener Project Opener
- Published:
- Last modified:
Description
A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may result in a denial-of-service condition.
Frequently asked questions
- What is CVE-2021-27498?
- A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may result in a denial-of-service condition.
- How severe is CVE-2021-27498?
- CVE-2021-27498 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2021-27498 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-27498?
- CVE-2021-27498 affects Opener Project Opener. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-27498?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2021-27498 published?
- CVE-2021-27498 was published on 2022-05-12 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:opener_project:opener:*:*:*:*:*:*:*:*
More vulnerabilities in Opener Project Opener
- CVE-2022-43605 — Critical (CVSS 10.0): An out-of-bounds write vulnerability exists in the SetAttributeList attribute_count_request functionality of EIP Stack…
- CVE-2022-43604 — Critical (CVSS 10.0): An out-of-bounds write vulnerability exists in the GetAttributeList attribute_count_request functionality of EIP Stack…
- CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
- CVE-2020-13556 — Critical (CVSS 9.8): An out-of-bounds write vulnerability exists in the Ethernet/IP server functionality of EIP Stack Group OpENer 2.3 and…
- CVE-2021-27478 — High (CVSS 8.2): A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb…
- CVE-2022-32434 — High (CVSS 7.8): EIPStackGroup OpENer v2.3.0 was discovered to contain a stack overflow via /bin/posix/src/ports/POSIX/OpENer+0x56073d.
All CVEs affecting Opener Project Opener →
Other CWE-617 (Reachable Assertion) vulnerabilities
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- CVE-2019-9795 — Critical (CVSS 9.8): A vulnerability where type-confusion in the IonMonkey just-in-time (JIT) compiler could potentially be used by…
- CVE-2026-31739 — High (CVSS 8.8): In the Linux kernel, the following vulnerability has been resolved: crypto: tegra - Add missing CRYPTO_ALG_ASYNC The…
- CVE-2020-12417 — High (CVSS 8.8): Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in…
- CVE-2020-6623 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_get_index.
- CVE-2020-6619 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has an assertion failure in stbtt__buf_seek.