How severe is CVE-2025-7209?

CVE-2025-7209 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-7209 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-7209?

CVE-2025-7209 affects 9fans Plan9port. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-7209?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-7209 have an EU (EUVD) identifier?

Yes. CVE-2025-7209 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20761.

When was CVE-2025-7209 published?

CVE-2025-7209 was published on 2025-07-09 and last updated on 2026-06-17.

CVE-2025-7209

CVE-2025-7209 is a low-severity vulnerability in 9fans Plan9port with a CVSS 3.x base score of 3.3. 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-476.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
CVSS v2: 1.7
CVSS v4: 1.9
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-20761
Weakness: CWE-476
Affected product: 9fans Plan9port
Published: 2025-07-09
Last modified: 2026-06-17

Description

A vulnerability has been found in 9fans plan9port up to 9da5b44 and classified as problematic. Affected by this vulnerability is the function value_decode in the library src/libsec/port/x509.c. The manipulation leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available. The identifier of the patch is deae8939583d83fd798fca97665e0e94656c3ee8. It is recommended to apply a patch to fix this issue.

Frequently asked questions

What is CVE-2025-7209?: A vulnerability has been found in 9fans plan9port up to 9da5b44 and classified as problematic. Affected by this vulnerability is the function value_decode in the library src/libsec/port/x509.c. The manipulation leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available. The identifier of the patch is deae8939583d83fd798fca97665e0e94656c3ee8. It is recommended to apply a patch to fix this issue.
How severe is CVE-2025-7209?: CVE-2025-7209 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-7209 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-7209?: CVE-2025-7209 affects 9fans Plan9port. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-7209?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-7209 have an EU (EUVD) identifier?: Yes. CVE-2025-7209 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20761.
When was CVE-2025-7209 published?: CVE-2025-7209 was published on 2025-07-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:9fans:plan9port:*:*:*:*:*:*:*:*

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