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TI-2021-09841 Aliases CVE-2021-28858GHSA-q9w3-4qx4-v262

TP-Link's TL-WPA4220 4.0.2 Build 20180308 Rel.37064 does not use SSL by default.

Priority LOW 24CWE-312Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-312.

Summary

TP-Link's TL-WPA4220 4.0.2 Build 20180308 Rel.37064 does not use SSL by default. Attacker on the local network can monitor traffic and capture the cookie and other sensitive information.

Why it matters now

EPSS 0.00257 17th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:tp-link:tl-wpa4220_firmware:4.0.2:build_20180308_rel.37064:*:*:*:*:*:*4.0.2 build_20180308_rel.37064VulnerableTP-Link
cpe:2.3:h:tp-link:tl-wpa4220:4.0:*:*:*:*:*:*:*4.0Running onTP-Link
  • cpe:2.3:o:tp-link:tl-wpa4220_firmware:4.0.2:build_20180308_rel.37064:*:*:*:*:*:* Versions 4.0.2 build_20180308_rel.37064 Vulnerable ·TP-Link
  • cpe:2.3:h:tp-link:tl-wpa4220:4.0:*:*:*:*:*:*:* Versions 4.0 Running on ·TP-Link

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-28858
  2. 2026-10-03 Alias added: GHSA-q9w3-4qx4-v262

References

Exploit 1

  • TI-2020-14869 httpd on TP-Link TL-WPA4220 devices (versions 2 through 4) allows remote authenticated… CVSS 3.1HIGH 8.8
  • TI-2021-09840 TP-Link's TL-WPA4220 4.0.2 Build 20180308 Rel.37064 username and password are sent via the cookie. CVSS 3.1HIGH 7.5
  • TI-2020-17035 httpd on TP-Link TL-WPA4220 devices (hardware versions 2 through 4) allows remote… CVSS 3.1MEDIUM 6.5

Sources

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