CVE-2025-36253
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedIBM Concert 1.0.0 through 2.1.0 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceIBM Concert versions 1.0.0 through 2.1.0 implements weaker than expected cryptographic algorithms, enabling attackers to decrypt highly sensitive information that was protected using these flawed mechanisms.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 1.0.0, < 2.2.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify IBM Concert versionRun 'ibmconcert version' or check the product installation directory for a version file, or query the API endpoint /version if accessibleAffected if The installed version falls within 1.0.0 through 2.1.0
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Locate cryptographic configurationSearch for configuration files named 'security.json', 'crypto-config.xml', or similar in the IBM Concert data or config directoriesAffected if Configuration files exist and specify algorithms weaker than AES-256
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Review encryption settings in configOpen the cryptographic configuration file and inspect the 'algorithm', 'cipher', or 'encryption' settings for use of DES, 3DES, RC4, or AES-128Affected if Weak algorithms such as DES, 3DES, RC4, or AES-128 are explicitly configured
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Check environment variables for crypto flagsInspect environment variables for IBM Concert processes, looking for flags like IBM_CONCERT_CRYPTO_ALGO, CRYPTO_STRENGTH, or similar that may override default behaviorAffected if Environment variables are set to legacy or weak crypto modes
You are affected if IBM Concert version is 1.0.0 through 2.1.0 and weak cryptographic algorithms (DES, 3DES, RC4, or AES-128) are configured or in use.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped2.2.0
Upgrade to a version beyond 2.1.0 that implements stronger cryptographic algorithms (e.g., AES-256 or stronger) and conduct a cryptographic audit to identify and replace all instances of weak encryption in the system.
IBM Concert 2.2.0
- Identify all deployments running IBM Concert versions 1.0.0 through 2.1.0
- Schedule a maintenance window for the upgrade
- Back up all existing data and configuration files
- Follow IBM's documented upgrade procedure to upgrade IBM Concert to version 2.2.0 or later
- After upgrade, verify the cryptographic configurations meet current security standards
- Monitor logs for any unusual activity during and after the transition
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $10,240.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-36253 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-36253 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data