6.5Medium
Absolute Secure Access
CVE-2026-55400
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.
What this means for your business
- It affects Absolute Secure Access. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it remotely, over a network, with an ordinary user login, and without anyone at your company clicking anything.
- FIRST's prediction model gives it a 0.3% chance of attack attempts being seen in the next 30 days, ranking above 18% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Absolute Secure Access, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 6.5 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H- CVSS v4
- 6.0
- Weakness
- CWE-190
- Assigned by
- SecurityResponse@netmotionsoftware.com
Dates
- Published
- 2026-08-13
- Last modified
- 2026-09-04
- Sources
- NVD
Affected products
- Absolute Secure Access- 14.57
As listed in the NVD configuration data. Not a statement about your estate.