CVE-2026-6930 in Concert
Summary
by MITRE • 10/19/2026
IBM Concert 1.0 through 3.0.0 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information.
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Analysis
by VulDB Data Team • 10/19/2026
The vulnerability identified in IBM Concert versions 1.0 through 3.0.0 represents a critical failure in the implementation of cryptographic primitives, specifically characterized by the use of weak or deprecated encryption algorithms. In modern security architectures, data at rest and data in transit must be protected using robust ciphers that resist known cryptanalytic attacks. The reliance on weaker-than-expected algorithms suggests that the software may have utilized legacy standards such as DES, RC4, or improperly configured modes of operation for AES, which are no longer considered secure against contemporary computational capabilities. This deficiency creates a significant attack surface where an adversary with access to encrypted data can potentially reverse-engineer the plaintext through brute-force attacks, statistical analysis, or known-plaintext techniques that exploit the mathematical weaknesses inherent in these outdated ciphers.
From a technical perspective, this flaw aligns closely with CWE-327, which classifies the use of a broken or risky cryptographic algorithm as a vulnerability. The operational impact is severe, particularly for organizations handling highly sensitive information such as personally identifiable information (PII), financial records, or proprietary intellectual property. If an attacker successfully decrypts this data, it leads to a complete compromise of confidentiality, potentially resulting in regulatory penalties under frameworks like GDPR or HIPAA, loss of customer trust, and competitive disadvantage. The vulnerability does not necessarily require active exploitation during runtime; rather, the risk persists as long as encrypted artifacts are stored or transmitted using these compromised methods, allowing for offline attacks where time is less of a constraint than it would be in real-time interception scenarios.
This issue also intersects with MITRE ATT&CK techniques related to Cryptographic Failure and Data Encrypted at Rest, specifically T1530 which covers data from cloud storage objects or local repositories being accessed after decryption if the keys are compromised due to weak implementation. The presence of such vulnerabilities indicates a potential gap in the software development lifecycle regarding security requirements and cryptographic agility. It suggests that the application may not have been designed with forward secrecy or key rotation strategies, making it vulnerable even if current computational power is insufficient for immediate decryption but susceptible to future advances in computing technology, including quantum computing threats.
To mitigate this risk, organizations must immediately audit their deployment of IBM Concert 1.0 through 3.0.0 and identify all instances where sensitive data is stored or transmitted using the identified weak algorithms. The primary remediation strategy involves upgrading to a patched version of IBM Concert that implements modern cryptographic standards such as AES-256 in GCM mode for symmetric encryption, ensuring compliance with NIST guidelines like SP 800-131A which mandates the deprecation of weaker ciphers. Additionally, if an upgrade is not immediately feasible, organizations should implement compensating controls such as network segmentation to limit access to encrypted data stores and enforce strict key management practices using hardware security modules or dedicated key vaults to protect encryption keys from extraction. Regular vulnerability scanning and penetration testing focused on cryptographic implementations are essential to detect similar weaknesses in other components of the infrastructure before they can be exploited by malicious actors seeking to exfiltrate sensitive information.