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SS7 Attacks Target UK Banks, Exposing Telecom Vulnerabilities

SS7 Attacks Target UK Banks, Exposing Telecom Vulnerabilities

First seen 30 Oct 2026, 14:18 UTC • •
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ThreatCluster AI
ThreatCluster •October 30, 2026 at 15:21 UTC
  • •SS7 vulnerabilities allow interception of SMS messages used for 2FA.
  • •Metro Bank is a confirmed victim of SS7-based attacks.
  • •The NCSC reports increasing exploitation of SS7 by cybercriminals.

Recent reports indicate that cybercriminals are exploiting vulnerabilities in the SS7 signaling protocol to intercept SMS messages and drain bank accounts, particularly affecting the UK's Metro Bank. The National Cyber Security Centre (NCSC) confirmed that these attacks utilize SS7 to intercept two-factor authentication codes. This method allows attackers to track phones globally and access sensitive information without the need for malware. While such attacks were previously thought to be limited to intelligence agencies, they are now increasingly accessible to financially motivated criminal groups. The ongoing exploitation of these vulnerabilities highlights significant weaknesses in telecommunications infrastructure that have been known for years. The NCSC has noted a rise in SS7-based requests targeting financial institutions, indicating a growing trend in these types of attacks.

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Timeline

2026-10-30
NCSC confirms SS7 attacks on banks
The NCSC acknowledged that SS7 is being exploited to intercept SMS codes for banking, impacting multiple financial institutions.
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Extracted Entities (11)

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Common questions

Which banks are affected?
Metro Bank has been specifically identified as a victim of SS7 attacks, but other financial institutions may also be at risk.
How urgent is this threat?
The threat is significant, with ongoing exploitation reported, requiring immediate attention from affected banks.
What protective measures should be taken?
Banks should enhance their security protocols, including implementing stronger authentication methods and monitoring for unusual SS7 traffic.