CVE-2026-55980 Overview
CVE-2026-55980 is a denial-of-service vulnerability in SecureAge CatchPulse. A local, authenticated attacker can trigger a stack buffer overrun that terminates the affected process and disrupts endpoint protection services. The flaw requires local access with low privileges and no user interaction.
Exploitation does not expose or modify data. Impact is limited to availability, which can leave endpoints without CatchPulse coverage until the process or host is restored. The Cyber Security Agency of Singapore (CSA) published advisory AL-2026-098 covering this issue.
Critical Impact
A local authenticated attacker can crash CatchPulse through a stack buffer overrun, producing a denial-of-service condition on the affected endpoint.
Affected Products
- SecureAge CatchPulse (see vendor advisory for affected builds)
- Endpoints running CatchPulse endpoint protection
- Windows systems with CatchPulse installed
Discovery Timeline
- 2026-08-06 - CVE-2026-55980 published to NVD
- 2026-08-06 - Last updated in NVD database
Technical Details for CVE-2026-55980
Vulnerability Analysis
The vulnerability is a stack-based buffer overflow ([CWE-121]) within a CatchPulse component reachable by a local, low-privileged user. Supplying oversized or malformed input to the vulnerable interface overwrites adjacent stack memory. The overrun corrupts control data such as saved return addresses or stack canaries, causing the process to abort.
The CVSS vector indicates confidentiality and integrity are not impacted. Only availability is affected, which aligns with a crash-only outcome rather than arbitrary code execution. Successful exploitation stops the CatchPulse service on the target host.
Root Cause
The defect stems from improper bounds checking on input copied into a fixed-size stack buffer. When the input length exceeds the destination buffer, the write continues past the buffer boundary. This behavior is characteristic of unsafe copy routines that do not validate size against destination capacity.
Attack Vector
An attacker requires local access to the endpoint and a valid low-privileged account. The attacker interacts with the vulnerable local interface exposed by CatchPulse and submits a crafted input that overflows the target buffer. No user interaction is required, and the attack completes without elevated privileges.
No verified public proof-of-concept is available. Technical details are described in prose per SecureAge and CSA advisories. See the CSA Security Alert AL-2026-098 and SecureAge Security Vulnerabilities Overview for vendor guidance.
Detection Methods for CVE-2026-55980
Indicators of Compromise
- Unexpected termination or repeated crashes of CatchPulse processes and services on endpoints
- Windows Error Reporting (WER) or application crash dumps referencing CatchPulse binaries with stack corruption signatures
- Gaps in CatchPulse telemetry or heartbeat from managed endpoints following local user activity
Detection Strategies
- Monitor Windows Event Log IDs 1000 and 1001 for application faults naming CatchPulse executables
- Correlate CatchPulse service stop events with the initiating user account and parent process
- Alert on repeated crash-restart cycles of endpoint protection services within short time windows
Monitoring Recommendations
- Forward endpoint application and service logs to a centralized SIEM for cross-host correlation
- Track CatchPulse agent health status and flag hosts where the service becomes unavailable
- Review local logon events preceding CatchPulse crashes to identify potentially abusive accounts
How to Mitigate CVE-2026-55980
Immediate Actions Required
- Inventory all endpoints running SecureAge CatchPulse and identify installed versions
- Apply the vendor-supplied update referenced in SecureAge Security Vulnerabilities Overview as soon as it is available for your build
- Restrict local interactive logon on sensitive systems to reduce the local attack surface
- Enable tamper protection and service auto-restart for CatchPulse where supported
Patch Information
SecureAge tracks CatchPulse security fixes on the SecureAge Security Vulnerabilities Overview page. CSA advisory AL-2026-098 directs administrators to apply the vendor patch for CVE-2026-55980. Confirm the fixed version with SecureAge support before deployment.
Workarounds
- Limit local access on affected endpoints to trusted administrators until the patch is deployed
- Enforce least privilege and disable unused local accounts that could reach the vulnerable interface
- Configure service recovery to automatically restart CatchPulse on failure to reduce protection gaps
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
