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Vulnerability Assessment

Weakness
CWE
CWE-326
OWASP Top 10:2025
A04:2025 - Cryptographic Failures
ASVS 5.0
V11 - Cryptography Encryption strength requirements
Impact

CVSS score of 5.9 (MEDIUM). Attack characteristics: network attack vector, high complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available. EPSS exploitation probability: 90.83%.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 90.8% exploitation probability (EPSS)

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AnalysisAI

The RC4 algorithm, as used in the TLS protocol and SSL protocol, has many single-byte biases, which makes it easier for remote attackers to conduct plaintext-recovery attacks via statistical analysis. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. Public exploit code available and EPSS exploitation probability 90.8%.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

This vulnerability is classified under CWE-326. The RC4 algorithm, as used in the TLS protocol and SSL protocol, has many single-byte biases, which makes it easier for remote attackers to conduct plaintext-recovery attacks via statistical analysis of ciphertext in a large number of sessions that use the same plaintext. Affected products include: Oracle Communications Application Session Controller, Oracle Http Server, Oracle Integrated Lights Out Manager Firmware, Fujitsu Sparc Enterprise M3000 Firmware, Fujitsu Sparc Enterprise M4000 Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 5.9 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

DescriptionCVE.org

The RC4 algorithm, as used in the TLS protocol and SSL protocol, has many single-byte biases, which makes it easier for remote attackers to conduct plaintext-recovery attacks via statistical analysis of ciphertext in a large number of sessions that use the same plaintext.

Threat Intelligence Overview

Threat Score
5.4/10
Composite threat intelligence
EPSS Score
90.8%
Top 0% exploitable
Exploit
POC
Public exploit code exists
Data Quality
3 sources
Confidence: Low
NVD CVE.org EPSS POC (1)

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC Yes
EPSS 90.8%
Patch available No
Active threat Yes
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

141
Low Medium High Critical
KEV: 0
EPSS: +91
CVSS: +30
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:a:oracle:communications_application_session_controller:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:http_server:11.1.1.7.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:http_server:11.1.1.9.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:http_server:12.1.3.0.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:http_server:12.2.1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:http_server:12.2.1.2.0:*:*:*:*:*:*:*
cpe:2.3:o:oracle:integrated_lights_out_manager_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:oracle:integrated_lights_out_manager_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:sparc_enterprise_m3000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:sparc_enterprise_m4000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:sparc_enterprise_m5000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:sparc_enterprise_m8000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:sparc_enterprise_m9000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:m10-1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:m10-4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:m10-4s_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:13.04:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:13.10:*:*:*:*:*:*:*
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References

Advisories & patches
REF http://blog.cryptographyengineering.com/2013/03/attack-of-week-rc4-is-kind-of-broken-in.html REF http://cr.yp.to/talks/2013.03.12/slides.pdf REF http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705 REF http://marc.info/?l=bugtraq&m=143039468003789&w=2 REF http://my.opera.com/securitygroup/blog/2013/03/20/on-the-precariousness-of-rc4 REF http://security.gentoo.org/glsa/glsa-201406-19.xml REF http://www.isg.rhul.ac.uk/tls/ REF http://www.mozilla.org/security/announce/2013/mfsa2013-103.html REF http://www.opera.com/docs/changelogs/unified/1215/ REF http://www.opera.com/security/advisory/1046 REF http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html REF http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html REF http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html REF http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html REF http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html REF http://www.securityfocus.com/bid/58796 REF http://www.ubuntu.com/usn/USN-2031-1 REF http://www.ubuntu.com/usn/USN-2032-1 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05289935 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05336888 REF https://security.gentoo.org/glsa/201504-01

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