Medium severity · published Aug 13, 2026
CVE-2026-55401
CVE-2026-55401 is a null dereference vulnerability on the load-balancing sub-system of Secure Access servers prior to 14.57
5.3
CVSS
0.4%
EPSS
No
On KEV
Description
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SA
Secure Access · Absolute Security
before 14.57 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-55401
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-55401
Vendor Advisory
https://www.absolute.com/platform/security-information/vulnerability-archive/cve-2026-55401
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