Vishing

In telecommunications, Vishing is voice-based phishing, where attackers use phone calls (often with spoofed caller IDs) to impersonate trusted entities and extract credentials, one-time passwords, or authorize fraudulent actions. STIR/SHAKEN, robocall analytics, and CLI-spoofing controls reduce the credibility of vishing campaigns.

Categories: Security ControlsThreats and AttacksFraud

Vishing in context

Security controls span signaling firewalls (SS7/Diameter/GTP screening), transport encryption (IPsec, TLS, PRINS), identity and access on OSS/BSS, and monitoring at both packet and log level. Controls are audited against GSMA FS.11/FS.19/FS.20/FS.36.

Telecom threats range from opportunistic SMS phishing and SIM swap to nation-state grade location tracking. The common thread is that most attacks exploit the inherited trust model of legacy signaling protocols.

To place Vishing in the wider telecom-security picture, review CLI Spoofing, MAC Filtering, A5/0, Artificial Traffic Inflation, ASN and BGP Hijacking — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

More from the TelcoSec Glossary

Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.