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TI-2026-03125 Aliases CVE-2026-3622GHSA-hhj2-6q7v-v5hc

Denial-of-Service Vulnerability in UPnP Component of TP Link's TL-WR841N

Priority LOW 31CWE-125Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-bounds read, potentially causing a crash of the UPnP service. Successful exploitation can cause the UPnP service to crash, resulting in a Denial-of-Service condition.  This vulnerability affects TL-WR841N v14 < EN_0.9.1 4.19 Build 260303 Rel.42399n (V14_260303) and < US_0.9.1.4.19 Build 260312 Rel. 49108n (V14_0304).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00372 31st percentileScored 2026-11-07
Fix Fixed TL-WR841N v14 (TP-Link Systems Inc.): 0.9.1 4.19

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-WR841N v14before 0.9.1 4.190.9.1 4.19Patch availableCNA
  • TL-WR841N v14 VendorTP-Link Affected before 0.9.1 4.19 Fixed in 0.9.1 4.19 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:tp-link:tl-wr841n_firmware:*:*:*:*:*:*:*:*before 0.9.1_4.19VulnerableTP-Link
cpe:2.3:h:tp-link:tl-wr841n:14:*:*:*:*:*:*:*14Running onTP-Link
  • cpe:2.3:o:tp-link:tl-wr841n_firmware:*:*:*:*:*:*:*:* Versions before 0.9.1_4.19 Vulnerable ·TP-Link
  • cpe:2.3:h:tp-link:tl-wr841n:14:*:*:*:*:*:*:* Versions 14 Running on ·TP-Link

Remediation

  • Fix · CNA TL-WR841N v14 (TP-Link Systems Inc.) Fixed in 0.9.1 4.19

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-3622
  2. 2026-10-03 Alias added: GHSA-hhj2-6q7v-v5hc
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Patch 2

Advisory 1

  • TI-2023-16571 TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain… KEVCVSS 3.1HIGH 8.8
  • TI-2025-08589 Authenticated RCE via Parental Control command injection KEVCVSS 4.0HIGH 8.6
  • TI-2015-02672 Directory traversal vulnerability in TP-LINK Archer C5 (1.2) with firmware before 150317… KEVCVSS 3.1HIGH 7.5
  • TI-2023-27456 Authentication bypass by spoofing in TP-Link TL-WR841N KEVCVSS 3.1MEDIUM 6.5
  • TI-2018-08378 An issue was discovered on TP-Link TL-WR840N v5 00000005 0.9.1 3.16 v0001.0 Build 170608… CVSS 3.0CRITICAL 9.8
  • TI-2026-02790 Authenticated Command Injection on TP-Link TL-WR802N, TL-WR841N and TL-WR840N CVSS 4.0HIGH 8.5
See all 38 →

Sources

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