How severe is CVE-2025-27021?

CVE-2025-27021 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-27021 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27021?

CVE-2025-27021 affects Nokia G42 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-27021?

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.

Does CVE-2025-27021 have an EU (EUVD) identifier?

Yes. CVE-2025-27021 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19698.

When was CVE-2025-27021 published?

CVE-2025-27021 was published on 2025-07-02 and last updated on 2026-06-17.

CVE-2025-27021

CVE-2025-27021 is a high-severity vulnerability in Nokia G42 Firmware with a CVSS 3.x base score of 7.0. 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-266.

Key facts

Severity: High (CVSS 3.x base score 7.0)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-19698
Weakness: CWE-266
Affected product: Nokia G42 Firmware
Published: 2025-07-02
Last modified: 2026-06-17

Description

The misconfiguration in the sudoers configuration of the operating system in Infinera G42 version R6.1.3 allows low privileged OS users to read/write physical memory via devmem command line tool. This could allow sensitive information disclosure, denial of service, and privilege escalation by tampering with kernel memory. Details: The output of "sudo -l" reports the presence of "devmem" command executable as super user without using a password. This command allows to read and write an arbitrary memory area of the target device, specifying an absolute address.

Frequently asked questions

What is CVE-2025-27021?: The misconfiguration in the sudoers configuration of the operating system in Infinera G42 version R6.1.3 allows low privileged OS users to read/write physical memory via devmem command line tool. This could allow sensitive information disclosure, denial of service, and privilege escalation by tampering with kernel memory. Details: The output of "sudo -l" reports the presence of "devmem" command executable as super user without using a password. This command allows to read and write an arbitrary memory area of the target device, specifying an absolute address.
How severe is CVE-2025-27021?: CVE-2025-27021 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-27021 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27021?: CVE-2025-27021 affects Nokia G42 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-27021?: 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.
Does CVE-2025-27021 have an EU (EUVD) identifier?: Yes. CVE-2025-27021 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19698.
When was CVE-2025-27021 published?: CVE-2025-27021 was published on 2025-07-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:nokia:g42_firmware:*:*:*:*:*:*:*:*

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