CVE-2026-15141

Referer Validation Bypass in TL-WR820N Web Management Interface

MEDIUM
5.7
CVSS Score
Published: August 12, 2026 at 10:35 PM UTC
Updated: October 23, 2026 at 07:10 PM UTC
2 products affected across 1 vendorTl WR820N FirmwareLink Tl WR820N· also runs on 1 platform

Using TL-WR820N v2 by TP-Link Systems Inc.?

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Severity
MEDIUM5.7
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

The web interface of the affected device relies on the HTTP referrer header as part of request validation.  Requests containing empty Referer value, or omitting the Referer header entirely, may be accepted and processed due to insufficient validation logic. Successful exploitation may allow an adjacent attacker with access to the web management interface to obtain device configuration details and other sensitive information.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.15.20
Affected range stops below 1.15.20, so it looks safe — our inference, not a vendor statement
tp-link-tl-wr820n (same device)
0 ≤ v < 1.15.20 Build 260611 Rel.29552n
Affected range stops below 1.15.20 Build 260611 Rel.29552n, so it looks safe — our inference, not a vendor statement

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-346

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