Medium severity · published Jul 15, 2026
CVE-2026-40953
Heap overflow in Secure Access clients
4.4
CVSS
0.1%
EPSS
No
On KEV
Description
CVE-2026-40953 is a heap overflow in the
certificate parsing function of Secure Access clients prior to 14.55. Attackers
with local access and administrator permissions can create a denial of service
attack against the client over which they have control.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% 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 14.55 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-40953
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-40953
Vendor Advisory
https://www.absolute.com/platform/security-information/vulnerability-archive/cve-2026-40953
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