Medium severity · published Aug 13, 2026
CVE-2026-55400
CVE-2026-55400 is an integer underflow in Secure Access servers prior to version 14.57
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
CVE-2026-55400 is an integer underflow in Secure Access servers prior to
version 14.57. Attackers with an authenticated session can send
specially crafted traffic to a server in a non-default configuration and
cause a persistent denial of service.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% 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-2026-55400
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-55400
Vendor Advisory
https://www.absolute.com/platform/security-information/vulnerability-archive/cve-2026-55400
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