CVE-2026-67862: n/a
open62541 version 1.5.5 contains a buffer overflow vulnerability in the high-level attribute reading logic within the client code. This flaw allows a remote attacker to cause a denial of service by triggering the overflow. The vulnerability has a high severity score of 7.5 and does not impact confidentiality or integrity, only availability.
AI Analysis
Technical Summary
CVE-2026-67862 identifies a buffer overflow in the open62541 1.5.5 client implementation, specifically in the high-level attribute reading logic located in src/client/ua_client_highlevel.c. This vulnerability can be exploited remotely without authentication to cause a denial of service condition. The CVSS v3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability. No patch or official remediation guidance is currently documented.
Potential Impact
The vulnerability allows remote attackers to cause a denial of service by exploiting a buffer overflow in the client attribute reading logic. There is no impact on confidentiality or integrity, but availability of the affected client software can be disrupted.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should consider limiting exposure of the affected client to untrusted networks or inputs to reduce risk.
CVE-2026-67862: n/a
Description
open62541 version 1.5.5 contains a buffer overflow vulnerability in the high-level attribute reading logic within the client code. This flaw allows a remote attacker to cause a denial of service by triggering the overflow. The vulnerability has a high severity score of 7.5 and does not impact confidentiality or integrity, only availability.
CVSS v3.1
Score 7.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-67862 identifies a buffer overflow in the open62541 1.5.5 client implementation, specifically in the high-level attribute reading logic located in src/client/ua_client_highlevel.c. This vulnerability can be exploited remotely without authentication to cause a denial of service condition. The CVSS v3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability. No patch or official remediation guidance is currently documented.
Potential Impact
The vulnerability allows remote attackers to cause a denial of service by exploiting a buffer overflow in the client attribute reading logic. There is no impact on confidentiality or integrity, but availability of the affected client software can be disrupted.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should consider limiting exposure of the affected client to untrusted networks or inputs to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-07-30T00:00:00.000Z
- State
- PUBLISHED
Threat ID: 6a7331b6bf8831d539e55ff6
Added to database: 08/05/2026, 12:51:02 UTC
Last enriched: 08/12/2026, 15:13:12 UTC
Last updated: 09/19/2026, 22:01:36 UTC
Views: 59
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