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TI-2021-09835 Aliases CVE-2021-28846GHSA-7xq3-xc97-hhr3

A Format String vulnerablity exists in TRENDnet TEW-755AP 1.11B03, TEW-755AP2KAC 1.11B03…

Priority LOW 30CWE-134Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-134 and the CVSS impact.

Summary

A Format String vulnerablity exists in TRENDnet TEW-755AP 1.11B03, TEW-755AP2KAC 1.11B03, TEW-821DAP2KAC 1.11B03, and TEW-825DAP 1.11B03, which could let a remote malicious user cause a denial of service due to a logic bug at address 0x40dcd0 when calling fprintf with "%s: key len = %d, too long\n" format. The two variables seem to be put in the wrong order. The vulnerability could be triggered by sending the POST request to apply_cgi with a long and unknown key in the request body.

Why it matters now

EPSS 0.00814 57th percentileScored 2026-11-07
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 · 8

CPEVersionsRoleVendor
cpe:2.3:o:trendnet:tew-755ap_firmware:1.11b03:*:*:*:*:*:*:*1.11b03VulnerableTRENDnet
cpe:2.3:h:trendnet:tew-755ap:-:*:*:*:*:*:*:*not specified by NVDRunning onTRENDnet
cpe:2.3:o:trendnet:tew-755ap2kac_firmware:1.11b03:*:*:*:*:*:*:*1.11b03VulnerableTRENDnet
cpe:2.3:h:trendnet:tew-755ap2kac:-:*:*:*:*:*:*:*not specified by NVDRunning onTRENDnet
cpe:2.3:o:trendnet:tew-821dap2kac_firmware:1.11b03:*:*:*:*:*:*:*1.11b03VulnerableTRENDnet
cpe:2.3:h:trendnet:tew-821dap2kac:-:*:*:*:*:*:*:*not specified by NVDRunning onTRENDnet
cpe:2.3:o:trendnet:tew-825dap_firmware:1.11b03:*:*:*:*:*:*:*1.11b03VulnerableTRENDnet
cpe:2.3:h:trendnet:tew-825dap:-:*:*:*:*:*:*:*not specified by NVDRunning onTRENDnet
  • cpe:2.3:o:trendnet:tew-755ap_firmware:1.11b03:*:*:*:*:*:*:* Versions 1.11b03 Vulnerable ·TRENDnet
  • cpe:2.3:h:trendnet:tew-755ap:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TRENDnet
  • cpe:2.3:o:trendnet:tew-755ap2kac_firmware:1.11b03:*:*:*:*:*:*:* Versions 1.11b03 Vulnerable ·TRENDnet
  • cpe:2.3:h:trendnet:tew-755ap2kac:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TRENDnet
  • cpe:2.3:o:trendnet:tew-821dap2kac_firmware:1.11b03:*:*:*:*:*:*:* Versions 1.11b03 Vulnerable ·TRENDnet
  • cpe:2.3:h:trendnet:tew-821dap2kac:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TRENDnet
  • cpe:2.3:o:trendnet:tew-825dap_firmware:1.11b03:*:*:*:*:*:*:* Versions 1.11b03 Vulnerable ·TRENDnet
  • cpe:2.3:h:trendnet:tew-825dap:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TRENDnet

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-28846
  2. 2026-10-03 Alias added: GHSA-7xq3-xc97-hhr3

References

Advisory 1

  • TI-2021-09834 Null Pointer Dereference vulnerability exists in TRENDnet TEW-755AP 1.11B03… CVSS 3.1HIGH 7.5
  • TI-2021-09833 Null Pointer Dereference vulnerability exists in TRENDnet TEW-755AP 1.11B03… CVSS 3.1HIGH 7.5
  • TI-2021-09832 Null Pointer Dereference vulnerability exists in TRENDnet TEW-755AP 1.11B03… CVSS 3.1HIGH 7.5
  • TI-2021-09831 Null Pointer Deference vulnerability exists in TRENDnet TEW-755AP 1.11B03, TEW-755AP2KAC… CVSS 3.1HIGH 7.5
  • TI-2021-09830 Null Pointer Dereference vulnerability in TRENDnet TEW-755AP 1.11B03, TEW-755AP2KAC… CVSS 3.1HIGH 7.5

Sources

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