Is CVE-2025-27021 in the CISA KEV catalog?

No. CVE-2025-27021 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-27021?

CVE-2025-27021 has a CVSS v3 base score of 7.0 (HIGH).

What is the EPSS score for CVE-2025-27021?

CVE-2025-27021 has an EPSS score of 0.13% (3th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-27021?

Upgrade g42 firmware to 7.1 or later.

CVE & CISA-KEV Catalog

CVE-2025-27021

HIGH

7.0

CVSS v3

NVD

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.

CWE-266

How to fix

Remediation Available

g42 firmwareNVD

Affected:>= 6.1.3, < 7.1Fixed in:7.1CVE-2025-27021derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.13%probability of exploitation in 30 days

3rdpercentile

Low risk: more likely to be exploited than 3% of all known CVEs.

References

Third-Party Advisory2

Related Vulnerabilities

Other CWE-266 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-28000	Critical	9.8	68%	-	Fix
CVE-2025-27007	Critical	9.8	51%	-	-
CVE-2025-47539	Critical	9.8	31%	-	Fix
CVE-2022-20759	High	8.8	28%	-	Fix
CVE-2024-13106	Medium	5.3	27%	-	-
CVE-2024-3013	Medium	6.3	23%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-02-11.