CVE-2026-40958— Input validation error in Secure Access clients prior to 14.55
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，该漏洞源于输入验证错误，攻击者利用对隧道协议的深入了解和完全控制，可对其客户端造成非持久性拒绝服务。
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Absolute Security | Secure Access | < 14.55 |
affected |
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I. Basic Information for CVE-2026-40958
Vulnerability Information
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Vulnerability Title
Input validation error in Secure Access clients prior to 14.55
Source: CVE Program / CVE List V5
Vulnerability Description
CVE-2026-40958
is a input validation error in 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:L/AT:P/PR:N/UI:P/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，该漏洞源于输入验证错误，攻击者利用对隧道协议的深入了解和完全控制，可对其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-2026-40958
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-40958 (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-2026-40957 | 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-2026-40955 | Integer underflow vulnerability in Secure Access clients | |
| 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-2026-40958
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