Is CVE-2026-4346 in the CISA KEV catalog?

No. CVE-2026-4346 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-4346?

CVE-2026-4346 has a CVSS v3 base score of 6.8 (MEDIUM).

What is the EPSS score for CVE-2026-4346?

CVE-2026-4346 has an EPSS score of 0.12% (3th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-4346?

Upgrade tl-wr850n firmware to 0.9.1_Build251205 or later.

CVE & CISA-KEV Catalog

CVE-2026-4346

MEDIUM

6.8

CVSS v3

NVD

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.

CWE-312

How to fix

Remediation Available

tl-wr850n firmwareNVD

Affected:< 0.9.1_Build251205Fixed in:0.9.1_Build251205CVE-2026-4346derived 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 VectorPhysical

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.12%probability of exploitation in 30 days

3rdpercentile

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

References

Vendor Advisory1

tp-link.com

Product1

tp-link.com

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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 2026-03-31.