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CVE-2026-75135— UpSignOn < 7.19.0 Sensitive Key Retention in Memory

Quick assessment

Affected
Septeo IT Solutions UpSignOn
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.

Septeo UpSignOn是法国Septeo公司的一款提供数字签名功能的电子签名服务平台。 Septeo UpSignOn 7.19.0之前版本存在加密问题漏洞，该漏洞源于UpSignOn.exe进程内存中保留备份密钥，攻击者可提取该密钥解密v6-vault1.DATA.txt中的加密主密码备份，从而恢复主密码并导出所有明文密码条目。

CVSS 6.1 · Medium EPSS 0.10% · P1

Affected Version Matrix 1

VendorProduct Version RangeStatus
Septeo IT Solutions UpSignOn < 7.19.0 affected
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I. Basic Information for CVE-2026-75135

Vulnerability Information
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Vulnerability Title
UpSignOn < 7.19.0 Sensitive Key Retention in Memory
Source: CVE Program / CVE List V5
Vulnerability Description
UpSignOn for Windows before 7.19.0 contains a sensitive data exposure vulnerability that allows local attackers to recover the master password and decrypt vault contents by reading a retained backup key from the process memory of UpSignOn.exe, even after the vault has been re-locked. Attackers can extract the backup key from process memory to decrypt the encrypted master password backup stored in v6-vault1.DATA.txt, then use the recovered master password to decrypt the main vault and export all password manager entries in cleartext.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在内存中的明文存储
Source: CVE Program / CVE List V5
Vulnerability Title
Septeo UpSignOn 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Septeo UpSignOn是法国Septeo公司的一款提供数字签名功能的电子签名服务平台。 Septeo UpSignOn 7.19.0之前版本存在加密问题漏洞，该漏洞源于UpSignOn.exe进程内存中保留备份密钥，攻击者可提取该密钥解密v6-vault1.DATA.txt中的加密主密码备份，从而恢复主密码并导出所有明文密码条目。
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
Septeo IT Solutions UpSignOn 0 ~ 7.19.0 -

II. Public POCs for CVE-2026-75135

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III. Intelligence Information for CVE-2026-75135

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Vendor Advisories for CVE-2026-75135 (1)

Vendor Pages for CVE-2026-75135 (1)

Same Patch Batch · Septeo IT Solutions · 2026-09-02 · 3 CVEs total

CVE-2026-75137 6.1 MEDIUM UpSignOn < 7.19.0 Sensitive Data Exposure in Process Memory after Lock
CVE-2026-75136 6.1 MEDIUM UpSignOn < 7.19.0 Biometric Key Exposure via Windows PasswordVault

IV. Related Vulnerabilities

Same product: UpSignOn
Same vendor: Septeo IT Solutions
Same weakness: CWE-316