How severe is CVE-2014-9527?

No CVSS score has been assigned to CVE-2014-9527 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2014-9527?

CVE-2014-9527 affects the following packages: org.apache.poi:poi (Maven). Ecosystems affected: Maven.

How do I fix CVE-2014-9527?

Update org.apache.poi:poi to 3.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2014-9527 is resolved across your whole dependency graph.

How do I detect CVE-2014-9527 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.poi:poi, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2014-9527 if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Is CVE-2014-9527 actively exploited in the wild?

No public exploit code has been indexed for CVE-2014-9527 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2014-9527?

CVE-2014-9527 has an EPSS (Exploit Prediction Scoring System) score of 6.6%, placing it in the 94th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2014-9527?

CVE-2014-9527 is classified as CWE-399 (CWE-399). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2014-9527 published, and has it been updated?

CVE-2014-9527 was published on January 6, 2015 and was last updated on April 16, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕ Maven

Not in CISA KEV

CVE-2014-9527 — poi

CVE-2014-9527 is a CWE-399 vulnerability in org.apache.poi:poi. A fix is available for org.apache.poi:poi — see the affected versions and patch details below.

Loop with Unreachable Exit Condition in Apache POI

Also known asGHSA-x9mm-6gpf-f749

Published

Jan 6, 2015

Updated

Apr 16, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

6.6%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs94th percentile — riskier than 94% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

☕org.apache.poi:poi

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

HSLFSlideShow in Apache POI before 3.11 allows remote attackers to cause a denial of service (infinite loop and deadlock) via a crafted PPT file.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apache.poi:poi`	all versions	3.11`org.apache.poi:poi:3.11`

Affected Products

2 products · 2 configurations

Application

poiapache

≤ 3.11

range

fedorafedoraproject

1 version

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.poi:poi, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.apache.poi:poi to 3.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2014-9527 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Product	Fixed in	Advisory
Red Hat JBoss Data Virtualization 6.2	`apache-poi`	RHSA-2016:1135

Frequently Asked Questions

HSLFSlideShow in Apache POI before 3.11 allows remote attackers to cause a denial of service (infinite loop and deadlock) via a crafted PPT file.

O3 Security · Impact-Aware SCA

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