A researcher discovered they could intercept and log hundreds of thousands of phone calls to military bases through flaws in E.164/ARPA telephone numbering routing protocols. The vulnerability highlights how legacy telephony infrastructure can be exploited to route calls through unintended paths, raising serious security and privacy concerns for government communications.
Background
E.164 is an international telephone numbering standard managed by the ITU, and its routing mechanisms rely on trust-based intercarrier agreements. Legacy telephony systems lack robust authentication, making them vulnerable to call interception and rerouting attacks.
- Source
- Hacker News (RSS)
- Published
- Aug 21, 2026 at 09:11 PM
- Score
- 8.0 / 10