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TI-2026-12752 Aliases CVE-2026-15141GHSA-fv83-qv7h-9c74

Referer Validation Bypass in TL-WR820N Web Management Interface

Priority LOW 23CWE-346Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-346.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00178 7th percentileScored 2026-11-07
Fix Fixed TL-WR820N v2 (TP-Link Systems Inc.): 1.15.20 Build 260611 Rel.29552n

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TP-LinkTL-WR820N v2before 1.15.20 Build 260611 Rel.29552n1.15.20 Build 260611 Rel.29552nPatch availableCNA
  • TL-WR820N v2 VendorTP-Link Affected before 1.15.20 Build 260611 Rel.29552n Fixed in 1.15.20 Build 260611 Rel.29552n Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:tp-link:tl-wr820n_firmware:*:*:*:*:*:*:*:*before 1.15.20VulnerableTP-Link
cpe:2.3:h:tp-link:tl-wr820n:2.0:*:*:*:*:*:*:*2.0Running onTP-Link
  • cpe:2.3:o:tp-link:tl-wr820n_firmware:*:*:*:*:*:*:*:* Versions before 1.15.20 Vulnerable ·TP-Link
  • cpe:2.3:h:tp-link:tl-wr820n:2.0:*:*:*:*:*:*:* Versions 2.0 Running on ·TP-Link

Remediation

  • Fix · CNA TL-WR820N v2 (TP-Link Systems Inc.) Fixed in 1.15.20 Build 260611 Rel.29552n

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-15141
  2. 2026-10-03 Alias added: GHSA-fv83-qv7h-9c74

References

Patch 2

Advisory 1

  • TI-2025-12954 Weak Algorithm Support in SSH Server on TL-WR820N CVSS 4.0MEDIUM 6.0

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences