CVE-2026-55400Network attack vector

Persistent denial of service via installer underflow

Published Aug 13, 2026 · Updated Aug 13, 2026

Integer underflow in the Absolute Secure Access server installer before 14.57 allows remote authenticated users to cause persistent service interruption. Absolute identifies the server installer but has not disclosed the arithmetic operation, affected routine, or crafted traffic field that produces the underflow. Exploitation requires an authenticated session and a non-default server configuration, and successful traffic leaves the service persistently unavailable.

CVSS severity6.0
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Integer underflow in the Absolute Secure Access server installer before 14.57 allows remote authenticated users to cause persistent service interruption. Absolute identifies the server installer but has not disclosed the arithmetic operation, affected routine, or crafted traffic field that produces the underflow. Exploitation requires an authenticated session and a non-default server configuration, and successful traffic leaves the service persistently unavailable.

The record

CVE
CVE-2026-55400
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
Absolute Security
Product
Absolute Secure Access
Classifications
CWE-190, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <14.57

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Absolute Security · Absolute Secure Accessversion=0 <14.57

Published CVSS scores

6.0Absolute SecurityCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo