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TI-2020-16316 Aliases CVE-2020-26887GHSA-fx9w-88ff-gqvq

FRITZ!OS before 7.21 on FRITZ!Box devices allows a bypass of a DNS Rebinding protection mechanism.

Priority LOW 37Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

FRITZ!OS before 7.21 on FRITZ!Box devices allows a bypass of a DNS Rebinding protection mechanism.

Why it matters now

EPSS 0.01419 72nd 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:avm:fritz\!box_7490_firmware:*:*:*:*:*:*:*:*before 7.21VulnerableAvm
cpe:2.3:h:avm:fritz\!box_7490:-:*:*:*:*:*:*:*not specified by NVDRunning onAvm
  • cpe:2.3:o:avm:fritz\!box_7490_firmware:*:*:*:*:*:*:*:* Versions before 7.21 Vulnerable ·Avm
  • cpe:2.3:h:avm:fritz\!box_7490:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Avm

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-26887
  2. 2026-10-03 Alias added: GHSA-fx9w-88ff-gqvq

References

Exploit 1

Advisory 2

Sources

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