How severe is CVE-2026-2565?

CVE-2026-2565 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-2565 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2565?

CVE-2026-2565 affects Wavlink Wl-nu516u1 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2565?

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

Does CVE-2026-2565 have an EU (EUVD) identifier?

Yes. CVE-2026-2565 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7665.

When was CVE-2026-2565 published?

CVE-2026-2565 was published on 2026-02-16 and last updated on 2026-06-17.

CVE-2026-2565

CVE-2026-2565 is a medium-severity vulnerability in Wavlink Wl-nu516u1 Firmware 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-119.

Key facts

Severity: Medium (CVSS 3.x base score 6.6)
CVSS v2: 6.8
CVSS v4: 6.6
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7665
Weakness: CWE-119
Affected product: Wavlink Wl-nu516u1 Firmware
Published: 2026-02-16
Last modified: 2026-06-17

Description

A weakness has been identified in Wavlink WL-NU516U1 20251208. Affected by this issue is the function sub_40785C of the file /cgi-bin/adm.cgi. This manipulation of the argument time_zone causes stack-based buffer overflow. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitation is known to be difficult. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Frequently asked questions

What is CVE-2026-2565?: A weakness has been identified in Wavlink WL-NU516U1 20251208. Affected by this issue is the function sub_40785C of the file /cgi-bin/adm.cgi. This manipulation of the argument time_zone causes stack-based buffer overflow. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitation is known to be difficult. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2026-2565?: CVE-2026-2565 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-2565 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2565?: CVE-2026-2565 affects Wavlink Wl-nu516u1 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2565?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-2565 have an EU (EUVD) identifier?: Yes. CVE-2026-2565 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7665.
When was CVE-2026-2565 published?: CVE-2026-2565 was published on 2026-02-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:wavlink:wl-nu516u1_firmware:*:*:*:*:*:*:*:*

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