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openssl_encrypt CVE-2026-81682

| EUVDEUVD-2026-67038 HIGH
Incorrect Default Permissions (CWE-276)
2026-08-27 VulnCheck GHSA-w3gg-cf3j-rxf4
Privilege Escalation Openssl Encrypt
8.6
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
8.6 HIGH
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
5.5 MEDIUM

Local attack requiring no attacker privileges, but victim user interaction to create output; impact is confidentiality only - no integrity or availability effect described.

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.0 AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Aug 27, 2026 - 18:02 EUVD
Analysis Generated
Aug 27, 2026 - 17:44 vuln.today
CVE Published
Aug 27, 2026 - 14:50 cve.org
HIGH 8.6

DescriptionCVE.org

openssl_encrypt versions before 1.4.9 contain an insecure file permissions vulnerability in the desktop GUI that writes decrypted plaintext with world-readable default permissions. Attackers can read decrypted output files created by the GUI as unprivileged local users on multi-user systems.

AnalysisAI

Insecure default file permissions in the openssl_encrypt desktop GUI (jahlives/openssl_encrypt, all versions before 1.4.9) expose decrypted plaintext output files to any unprivileged local user on multi-user systems. Any co-resident local account can read sensitive plaintext written by the GUI without requiring elevated privileges or exploiting any authentication mechanism. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain local unprivileged account on shared host
Exploit
Identify or enumerate decrypted output file path
Execution
Wait for victim to run openssl_encrypt GUI
Impact
Read world-readable decrypted plaintext file
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Vulnerability AssessmentAI

Exploitation Exploitation requires the attacker to hold a local unprivileged account on the same multi-user host as the victim. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 4.0 score of 8.6 with VC:H/VI:H/VA:H materially overstates the impact: the description supports only unauthorized read access to decrypted files (confidentiality breach), not integrity or availability compromise; VI:H and VA:H are not corroborated by the vulnerability description and should be treated as suspect. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with a local unprivileged account on a shared Linux or macOS workstation identifies the output directory used by the openssl_encrypt GUI. After a legitimate user decrypts a sensitive file using the GUI, the attacker reads the world-readable plaintext output file directly using standard file-read commands without any privilege escalation. …
Remediation Vendor-released patch: 1.4.9. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify all systems running openssl_encrypt versions prior to 1.4.9 and determine which operate in multi-user environments. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-81682 vulnerability details – vuln.today
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