How severe is CVE-2026-4346?

CVE-2026-4346 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-4346 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-2026-4346?

CVE-2026-4346 affects Tp-link Tl-wr850n Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4346?

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

Does CVE-2026-4346 have an EU (EUVD) identifier?

Yes. CVE-2026-4346 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16452.

When was CVE-2026-4346 published?

CVE-2026-4346 was published on 2026-03-26 and last updated on 2026-06-17.

CVE-2026-4346

CVE-2026-4346 is a medium-severity vulnerability in Tp-link Tl-wr850n Firmware with a CVSS 3.x base score of 6.8. 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-312.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
CVSS v4: 5.1
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16452
Weakness: CWE-312
Affected product: Tp-link Tl-wr850n Firmware
Published: 2026-03-26
Last modified: 2026-06-17

Description

The vulnerability affecting TL-WR850N v3 allows cleartext storage of administrative and Wi-Fi credentials in a region of the device’s flash memory while the serial interface remains enabled and protected by weak authentication. An attacker with physical access and the ability to connect to the serial port can recover sensitive information, including the router’s management password and wireless network key. Successful exploitation can lead to full administrative control of the device and unauthorized access to the associated wireless network.

Frequently asked questions

What is CVE-2026-4346?: The vulnerability affecting TL-WR850N v3 allows cleartext storage of administrative and Wi-Fi credentials in a region of the device’s flash memory while the serial interface remains enabled and protected by weak authentication. An attacker with physical access and the ability to connect to the serial port can recover sensitive information, including the router’s management password and wireless network key. Successful exploitation can lead to full administrative control of the device and unauthorized access to the associated wireless network.
How severe is CVE-2026-4346?: CVE-2026-4346 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-4346 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-2026-4346?: CVE-2026-4346 affects Tp-link Tl-wr850n Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4346?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-4346 have an EU (EUVD) identifier?: Yes. CVE-2026-4346 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16452.
When was CVE-2026-4346 published?: CVE-2026-4346 was published on 2026-03-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tp-link:tl-wr850n_firmware:*:*:*:*:*:*:*:*

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