EUVD-2026-58115
GHSA-8pcf-2r89-jjr2
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-accessible, no auth, no complexity; availability impact is low because the server continues to function and failover is preserved.
Primary rating from Vendor (netmotionsoftware).
CVSS VectorVendor: netmotionsoftware
Lifecycle Timeline
2DescriptionCVE.org
CVE-2026-55401 is a null dereference vulnerability on the load-balancing sub-system of Secure Access servers prior to 14.57. Attackers can send an unauthenticated packet to a Secure Access server with load balancing enabled, which results in the internal load balancer crashing. After a successful attack, the Secure Access server is still able to accept connections and is still able to issue a failover to connected clients. https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L
AnalysisAI
Null dereference in the load-balancing subsystem of Absolute Secure Access servers (prior to 14.57) allows unauthenticated remote attackers to crash the internal load balancer process by sending a single crafted packet. Exploitation is constrained to deployments with load balancing enabled; critically, the Secure Access server itself remains operational after the attack, continues to accept client connections, and retains the ability to failover - limiting real-world impact to partial load-distribution disruption rather than full service outage. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The load-balancing feature must be explicitly enabled on the Secure Access server - this is the sole configuration prerequisite. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 6.9 (Medium) reflects the network-accessible, unauthenticated, zero-complexity attack surface, but is appropriately tempered by a low availability impact rating (VA:L) and the explicit vendor statement that the server continues to serve connections post-exploit. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Absolute Secure Access servers to version 14.57 or later, which contains the vendor-released patch for this null dereference. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Denial Of Service
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External POC / Exploit Code
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