CVE-2026-94055 Vulnerability Analysis & Exploit Details

CVE-2026-94055
Vulnerability Scoring

3.7
/10
Moderate Risk

Exploiting CVE-2026-94055 requires specific conditions, leading to a moderate security impact.

Attack Complexity Details

  • Attack Complexity: High
    Exploits require significant effort and special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2026-94055 Details

Status: Received on 19 Sep 2026, 23:17 UTC

Published on: 19 Sep 2026, 23:17 UTC

CVSS Release: version 3

CVSS3 Source

cve@mitre.org

CVSS3 Type

Secondary

CVSS3 Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CVE-2026-94055 Vulnerability Summary

CVE-2026-94055: Exim before 4.100.1, when certain non-default TLS settings are used with GnuTLS, has a use-after-free.

Assessing the Risk of CVE-2026-94055

Access Complexity Graph

The exploitability of CVE-2026-94055 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-94055

CVE-2026-94055 presents a challenge to exploit due to its high attack complexity, but the absence of privilege requirements still makes it a viable target for skilled attackers. A thorough security review is advised.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-94055, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2026-94055, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2026-94055 has no significant impact on data confidentiality.
  • Integrity: None
    CVE-2026-94055 poses no threat to data integrity.
  • Availability: Low
    CVE-2026-94055 may slightly degrade system performance without fully affecting service availability.

CVE-2026-94055 References

External References

CWE Common Weakness Enumeration

CWE-416

Protect Your Infrastructure against CVE-2026-94055: Combat Critical CVE Threats

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  • CVE-2026-94057 – Exim before 4.100.1 allows SMTP smuggling in which the received message does not match any sent message, and instead depends on crafted data sent a...
  • CVE-2026-94056 – Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, allows attackers to read certain uninitialized data from stack memory.
  • CVE-2026-94055 – Exim before 4.100.1, when certain non-default TLS settings are used with GnuTLS, has a use-after-free.
  • CVE-2026-94054 – Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write.
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