Medium severity5.9NVD Advisory· Published May 17, 2021· Updated Jun 17, 2026
CVE-2021-27342
CVE-2021-27342
Description
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
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- D-Link/Router model DIR-842 firmwaredescription
Patches
Vulnerability mechanics
References
3- blog.whtaguy.com/2021/05/d-link-router-cve-2021-27342.htmlnvdExploitThird Party Advisory
- github.com/guywhataguy/D-Link-CVE-2021-27342-exploit/blob/main/dlink-telnet-exploit-CVE-2021-27342.pynvdExploitThird Party Advisory
- supportannouncement.us.dlink.com/announcement/publication.aspxnvdVendor Advisory
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