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Finger Protocol Vulnerabilities Exploited for Social Engineering Attacks

Finger Protocol Vulnerabilities Exploited for Social Engineering Attacks

First seen 27 May 2026, 19:41 UTC

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ThreatCluster AI
ThreatCluster May 28, 2026 at 19:28 UTC
  • The Finger protocol is being exploited for social engineering attacks.
  • Hackers can obtain sensitive user information, facilitating impersonation.
  • Organizations using the Finger protocol are at increased risk of data breaches.

The Finger protocol, originally designed for user information exchange, has been exploited for social engineering attacks. Hackers utilize the protocol to gather sensitive user data, such as email addresses and phone numbers, from organizations. This information can be used to impersonate employees and initiate phishing attacks. The protocol's ease of access and the detailed user information it provides raise significant privacy and security concerns. While the Finger protocol was useful in the early days of networking, its vulnerabilities are now being actively targeted by malicious actors. Organizations relying on this protocol are at risk of data breaches and social engineering attacks. The current status indicates ongoing exploitation attempts, necessitating immediate attention from cybersecurity professionals.

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Updated 106d ago How this analysis works

Timeline

Date unknown
Finger protocol developed
Les Earnest created the Finger protocol to provide user information at the Stanford AI Lab.
gunkies.org
Date unknown
Finger protocol extended to ARPANET
The protocol was expanded to allow information exchange between ARPANET hosts, enhancing its utility.
gunkies.org
Date unknown
Vulnerabilities exploited for social engineering
Hackers began using the Finger protocol to gather user data for social engineering attacks.
handwiki.org

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