CVE-2026-19654 Vulnerability Analysis & Exploit Details

CVE-2026-19654
Vulnerability Scoring

7.5
/10
Very High Risk

Highly exploitable, CVE-2026-19654 poses a critical security risk that could lead to severe breaches.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or 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-2026-19654 Details

Status: Modified

Last updated: 🕒 10 Sep 2026, 15:17 UTC
Originally published on: 🕘 12 Aug 2026, 21:17 UTC

Time between publication and last update: 28 days

CVSS Release: version 3

CVSS3 Source

secalert@redhat.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2026-19654 Vulnerability Summary

CVE-2026-19654: A unauthenticated remote peer may lead rsyslogd to crash due to a flaw in the optional imptcp module. A crafted input sequence during oversize-frame recovery can cause an invalid internal message length and terminate rsyslogd. No confidentiality or integrity impact, privilege escalation, or code execution has been identified. imtcp and the default imptcp framing modes are not affected.

Assessing the Risk of CVE-2026-19654

Access Complexity Graph

The exploitability of CVE-2026-19654 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-2026-19654

With low attack complexity and no required privileges, CVE-2026-19654 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

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-2026-19654, 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-2026-19654, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2026-19654 has no significant impact on data confidentiality.
  • Integrity: None
    CVE-2026-19654 poses no threat to data integrity.
  • Availability: High
    CVE-2026-19654 can disrupt system operations, potentially causing complete denial of service (DoS).

CVE-2026-19654 References

External References

CWE Common Weakness Enumeration

CWE-125

CAPEC Common Attack Pattern Enumeration and Classification

  • Overread Buffers CAPEC-540 An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.

Vulnerable Configurations

  • cpe:2.3:a:rsyslog:rsyslog:8.36.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.36.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.37.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.37.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.38.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.38.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.39.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.39.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.40.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.40.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.1901.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.1901.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.1903.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.1903.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.1904.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.1904.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.1905.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.1905.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.1908.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.1908.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.1910.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.1910.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.1911.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.1911.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2001.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2001.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2002.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2002.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2004.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2004.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2006.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2006.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2008.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2008.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2010.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2010.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2012.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2012.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2102.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2102.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2104.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2104.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2106.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2106.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2108.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2108.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2110.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2110.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2112.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2112.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2202.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2202.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2204.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2204.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2204.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2204.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2206.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2206.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2206.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2206.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2208.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2208.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2210.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2210.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2212.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2212.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2302.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2302.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2304.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2304.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2306.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2306.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2308.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2308.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2310.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2310.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2312.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2312.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2402.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2402.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2404.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2404.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2406.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2406.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2406.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2406.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2406.2:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2406.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2406.3:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2406.3:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2408.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2408.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2410.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2410.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2412.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2412.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2502.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2502.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2504.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2504.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2506.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2506.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2508.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2508.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2510.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2510.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2512.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2512.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2602.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2602.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2604.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2604.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:8.2606.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:8.2606.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

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