CVE-2026-42767

Published: Giu 09, 2026 Last Modified: Giu 16, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,9
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high

Description

AI Translation Available

Issue summary: An attacker-controlled CMP (Certificate Management Protocol)
server could trigger a NULL pointer dereference in a CMP client application.

Impact summary: A NULL pointer dereference causes a crash of the
application and a Denial of Service.

An attacker controlling a CMP server (or acting as a man-in-the-middle) could
craft a CMP response containing a CRMF (Certificate Request Message Format)
CertRepMessage with an EncryptedValue structure where the symmAlg field
has an algorithm OID but no parameters field. When the OpenSSL CMP client
processes this response, the NULL dereference occurs, causing a crash of
the CMP client.

Applications that process untrusted CMP/CRMF messages may be affected.

The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this
issue, as the affected code is outside the OpenSSL FIPS module boundary.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0006
Percentile
0,2th
Updated

EPSS Score Trend (Last 7 Days)

476

NULL Pointer Dereference

Stable
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality
Potential Impacts:
Dos: Crash, Exit, Or Restart Execute Unauthorized Code Or Commands Read Memory Modify Memory
Applicable Platforms
Languages: C, C++, Java, C#, Go
Likelihood of Exploit: Medium
View CWE Details
Application

Openssl by Openssl

Product Information
Vendor Openssl
Product Openssl
Version Range Affected
From 3.5.0 (inclusive)
To 3.5.7 (exclusive)
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Openssl by Openssl

Product Information
Vendor Openssl
Product Openssl
Version 4.0.0
cpe:2.3:a:openssl:openssl:4.0.0:-:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Openssl by Openssl

Product Information
Vendor Openssl
Product Openssl
Version Range Affected
From 3.4.0 (inclusive)
To 3.4.6 (exclusive)
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Openssl by Openssl

Product Information
Vendor Openssl
Product Openssl
Version Range Affected
From 3.6.0 (inclusive)
To 3.6.3 (exclusive)
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Openssl by Openssl

Product Information
Vendor Openssl
Product Openssl
Version Range Affected
From 3.0.0 (inclusive)
To 3.0.21 (exclusive)
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://github.com/openssl/openssl/commit/61a86a8cd73546c9f…
https://github.com/openssl/openssl/commit/61a86a8cd73546c9fea916f3d304c1293e05c…
https://github.com/openssl/openssl/commit/665d5254083affde9…
https://github.com/openssl/openssl/commit/665d5254083affde9982efca7c41dd01cacc8…
https://github.com/openssl/openssl/commit/810b722f772652ad4…
https://github.com/openssl/openssl/commit/810b722f772652ad48042bcc7ab07e3414b11…
https://github.com/openssl/openssl/commit/b90ff3b1bd33b1c18…
https://github.com/openssl/openssl/commit/b90ff3b1bd33b1c18e6a09936d097c2eddef8…
https://github.com/openssl/openssl/commit/e6f912907fc2ec82a…
https://github.com/openssl/openssl/commit/e6f912907fc2ec82a0fd07aae55172c5e5e3d…
https://openssl-library.org/news/secadv/20260609.txt
https://openssl-library.org/news/secadv/20260609.txt