How severe is CVE-2026-29516?

CVE-2026-29516 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-29516 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-29516?

CVE-2026-29516 affects Buffaloamericas Terastation Nas Ts5400r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-29516?

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

Does CVE-2026-29516 have an EU (EUVD) identifier?

Yes. CVE-2026-29516 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12494.

When was CVE-2026-29516 published?

CVE-2026-29516 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2026-29516

CVE-2026-29516 is a medium-severity vulnerability in Buffaloamericas Terastation Nas Ts5400r Firmware with a CVSS 3.x base score of 4.9. 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-732.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
CVSS v4: 6.9
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12494
Weakness: CWE-732
Affected product: Buffaloamericas Terastation Nas Ts5400r Firmware
Published: 2026-03-16
Last modified: 2026-06-17

Description

Buffalo TeraStation NAS TS5400R firmware version 4.02-0.06 and prior contain an excessive file permissions vulnerability that allows authenticated attackers to read the /etc/shadow file by uploading and executing a PHP file through the webserver. Attackers can exploit world-readable permissions on /etc/shadow to retrieve hashed passwords for all configured accounts including root.

Frequently asked questions

What is CVE-2026-29516?: Buffalo TeraStation NAS TS5400R firmware version 4.02-0.06 and prior contain an excessive file permissions vulnerability that allows authenticated attackers to read the /etc/shadow file by uploading and executing a PHP file through the webserver. Attackers can exploit world-readable permissions on /etc/shadow to retrieve hashed passwords for all configured accounts including root.
How severe is CVE-2026-29516?: CVE-2026-29516 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-29516 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-29516?: CVE-2026-29516 affects Buffaloamericas Terastation Nas Ts5400r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-29516?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-29516 have an EU (EUVD) identifier?: Yes. CVE-2026-29516 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12494.
When was CVE-2026-29516 published?: CVE-2026-29516 was published on 2026-03-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:buffaloamericas:terastation_nas_ts5400r_firmware:*:*:*:*:*:*:*:*

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