CVE-2026-40955— Integer underflow vulnerability in Secure Access clients
Quick assessment
Affected
Absolute Security Secure Access
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Absolute secure access是Absolute公司的一套企业访问控制解决方案。 Absolute Secure Access 14.55之前版本存在安全漏洞，该漏洞源于traffic parsing函数存在整数下溢，可能导致攻击者对客户端造成非持久性拒绝服务。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Absolute Security | Secure Access | < 14.55 |
affected |
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I. Basic Information for CVE-2026-40955
Vulnerability Information
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Vulnerability Title
Integer underflow vulnerability in Secure Access clients
Source: CVE Program / CVE List V5
Vulnerability Description
CVE-2026-40955 is an integer underflow
vulnerability in the traffic parsing function of Secure Access clients prior to
14.55. Attackers with intimate knowledge of and total control over the tunnel
protocol can create a non-persistent DoS against their client.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Absolute Secure Access 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Absolute secure access是Absolute公司的一套企业访问控制解决方案。 Absolute Secure Access 14.55之前版本存在安全漏洞，该漏洞源于traffic parsing函数存在整数下溢，可能导致攻击者对客户端造成非持久性拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Absolute Security | Secure Access | 0 ~ 14.55 | - |
|
II. Public POCs for CVE-2026-40955
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-40955 (1)
Same Patch Batch · Absolute Security · 2026-07-15 · 11 CVEs total
| CVE-2026-40952 | Privilge misconfiguration in Secure Access installers | |
| CVE-2026-40953 | Heap overflow in Secure Access clients | |
| CVE-2026-40958 | Input validation error in Secure Access clients prior to 14.55 | |
| CVE-2026-40957 | Frameable content vulnerability in the Secure Access server login page | |
| CVE-2026-40956 | Memory disclosure in Secure Access Clients | |
| CVE-2026-40954 | Integer underflow in Secure Access clients prior to 14.55 | |
| CVE-2026-33443 | Memory management error in Secure Access servers prior to 14.55 | |
| CVE-2026-55399 | Resource exhaustion vulnerability in the Secure Access publisher | |
| CVE-2026-55398 | Memory management vulnerability in Secure Access clients | |
| CVE-2026-33445 | Memory management vulnerability in Secure Access servers |
IV. Related Vulnerabilities
Same product: Secure Access
Same vendor: Absolute Security
V. Comments for CVE-2026-40955
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