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TI-2021-08848 Aliases CVE-2021-27342GHSA-255g-8gjp-2wq6

An authentication brute-force protection mechanism bypass in telnetd in D-Link Router…

Priority LOW 34CWE-203Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-203.

Summary

An authentication brute-force protection mechanism bypass in telnetd in D-Link Router model DIR-842 firmware version 3.0.2 allows a remote attacker to circumvent the anti-brute-force cool-down delay period via a timing-based side-channel attack

Why it matters now

EPSS 0.04562 91st percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged 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:dlink:dir-842e_firmware:*:*:*:*:*:*:*:*up to 3.0.2VulnerableD-Link Japan K.K.
cpe:2.3:h:dlink:dir-842e:r1:*:*:*:*:*:*:*r1Running onD-Link Japan K.K.
  • cpe:2.3:o:dlink:dir-842e_firmware:*:*:*:*:*:*:*:* Versions up to 3.0.2 Vulnerable ·D-Link Japan K.K.
  • cpe:2.3:h:dlink:dir-842e:r1:*:*:*:*:*:*:* Versions r1 Running on ·D-Link Japan K.K.

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-27342
  2. 2026-10-03 Alias added: GHSA-255g-8gjp-2wq6

References

Exploit 2

Advisory 1

Sources

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