TeleMessage TM SGNL Initialization of a Resource with an Insecure Default Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2025-07-01
• EPSS: 11% chance of exploitation in the next 30 days (higher than 96% of CVEs)

[ Description ]Official description

The TeleMessage service through 2025-05-05 configures Spring Boot Actuator with an exposed heap dump endpoint at a /heapdump URI, as exploited in the wild in May 2025.

CISA: TeleMessage TM SGNL contains an initialization of a resource with an insecure default vulnerability. This vulnerability relies on how the Spring Boot Actuator is configured with an exposed heap dump endpoint at a /heapdump URI.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 22 Jul 2025): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• www.wired.com/story/how-the-signal-knock-off-app-telemessage-got-hacked-in-20-minutesPress/Media Coverage
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource