CVE-2026-20709
CVE-2026-20709 is a medium-severity vulnerability with a CVSS 3.x base score of 6.6. 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-1394.
Key facts
- Severity: Medium (CVSS 3.x base score 6.6)
- CVSS v4: 5.8
- EPSS exploit prediction: 0% (2nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-20538
- Weakness: CWE-1394
- Published:
- Last modified:
Description
Use of Default Cryptographic Key in the hardware for some Intel(R) Pentium(R) Processor Silver Series, Intel(R) Celeron(R) Processor J Series, Intel(R) Celeron(R) Processor N Series may allow an escalation of privilege. Hardware reverse engineer adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via physical access when attack requirements are present with special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (high) and availability (none) impacts.
Frequently asked questions
- What is CVE-2026-20709?
- Use of Default Cryptographic Key in the hardware for some Intel(R) Pentium(R) Processor Silver Series, Intel(R) Celeron(R) Processor J Series, Intel(R) Celeron(R) Processor N Series may allow an escalation of privilege. Hardware reverse engineer adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via physical access when attack requirements are present with special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (high) and availability (none) impacts.
- How severe is CVE-2026-20709?
- CVE-2026-20709 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over physical access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
- Is CVE-2026-20709 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-20709?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-20709 have an EU (EUVD) identifier?
- Yes. CVE-2026-20709 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20538.
- When was CVE-2026-20709 published?
- CVE-2026-20709 was published on 2026-04-08 and last updated on 2026-06-17.
References
Other CWE-1394 vulnerabilities
- CVE-2025-41742 — Critical (CVSS 9.8): Sprecher Automations SPRECON-E-C, SPRECON-E-P, SPRECON-E-T3 is vulnerable to attack by an unauthorized remote…
- CVE-2024-48956 — Critical (CVSS 9.8): Serviceware Processes 6.0 through 7.3 before 7.4 allows attackers without valid authentication to send a specially…
- CVE-2025-41744 — Critical (CVSS 9.1): Sprecher Automations SPRECON-E series uses default cryptographic keys that allow an unprivileged remote attacker to…
- CVE-2025-55049 — Critical (CVSS 9.1): Use of Default Cryptographic Key (CWE-1394)
- CVE-2024-1275 — Critical (CVSS 9.1): Use of Default Cryptographic Key vulnerability in Baxter Welch Allyn Connex Spot Monitor may allow…
- CVE-2024-29037 — Critical (CVSS 9.1): datahub-helm provides the Kubernetes Helm charts for deploying Datahub and its dependencies on a Kubernetes cluster.…