CVE-2016-6303

highpriority · attend · 50EPSS 0.320 · 98 %ileDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

—

no known exploitation

Likely / severe?

32.0% (98th) EPSS

CVSS 7.5 · high

Is it mine?

139 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Integer overflow in the MDC2_Update function in crypto/mdc2/mdc2dgst.c in OpenSSL before 1.1.0 allows remote attackers to cause a denial of service (out-of-bounds write and application crash) or possibly have unspecified other impact via unknown vectors.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedSCALANCE X204RNA (HSR) (6GK5204-0BA00-2MB2)siemens_psirt
Update to V3.2.7 or later version
https://support.industry.siemens.com/cs/ww/en/view/109814809/
FixedSCALANCE X204RNA (PRP) (6GK5204-0BA00-2KB2)siemens_psirt
Update to V3.2.7 or later version
https://support.industry.siemens.com/cs/ww/en/view/109814809/
FixedSCALANCE X204RNA EEC (HSR) (6GK5204-0BS00-2NA3)siemens_psirt
Update to V3.2.7 or later version
https://support.industry.siemens.com/cs/ww/en/view/109814809/
FixedSCALANCE X204RNA EEC (PRP) (6GK5204-0BS00-3LA3)siemens_psirt
Update to V3.2.7 or later version
https://support.industry.siemens.com/cs/ww/en/view/109814809/
FixedSCALANCE X204RNA EEC (PRP/HSR) (6GK5204-0BS00-3PA3)siemens_psirt
Update to V3.2.7 or later version
https://support.industry.siemens.com/cs/ww/en/view/109814809/
FixedSCALANCE X204RNA (HSR) (6GK5204-0BA00-2MB2)cisa_csaf_ot
Update to V3.2.7 or later version
https://support.industry.siemens.com/cs/ww/en/view/109814809/
FixedSCALANCE X204RNA (PRP) (6GK5204-0BA00-2KB2)cisa_csaf_ot
Update to V3.2.7 or later version
https://support.industry.siemens.com/cs/ww/en/view/109814809/
FixedSCALANCE X204RNA EEC (HSR) (6GK5204-0BS00-2NA3)cisa_csaf_ot
Update to V3.2.7 or later version
https://support.industry.siemens.com/cs/ww/en/view/109814809/
FixedSCALANCE X204RNA EEC (PRP) (6GK5204-0BS00-3LA3)cisa_csaf_ot
Update to V3.2.7 or later version
https://support.industry.siemens.com/cs/ww/en/view/109814809/
FixedSCALANCE X204RNA EEC (PRP/HSR) (6GK5204-0BS00-3PA3)cisa_csaf_ot
Update to V3.2.7 or later version
https://support.industry.siemens.com/cs/ww/en/view/109814809/
MitigationSCALANCE X204RNA (HSR) (6GK5204-0BA00-2MB2)siemens_psirt
Deactivate the webserver if not required, and if deactivation is supported by the product
MitigationSCALANCE X204RNA (PRP) (6GK5204-0BA00-2KB2)siemens_psirt
Deactivate the webserver if not required, and if deactivation is supported by the product
MitigationSCALANCE X204RNA EEC (HSR) (6GK5204-0BS00-2NA3)siemens_psirt
Deactivate the webserver if not required, and if deactivation is supported by the product
MitigationSCALANCE X204RNA EEC (PRP) (6GK5204-0BS00-3LA3)siemens_psirt
Deactivate the webserver if not required, and if deactivation is supported by the product
MitigationSCALANCE X204RNA EEC (PRP/HSR) (6GK5204-0BS00-3PA3)siemens_psirt
Deactivate the webserver if not required, and if deactivation is supported by the product
MitigationSCALANCE X204RNA (HSR) (6GK5204-0BA00-2MB2)cisa_csaf_ot
Deactivate the webserver if not required, and if deactivation is supported by the product
MitigationSCALANCE X204RNA (PRP) (6GK5204-0BA00-2KB2)cisa_csaf_ot
Deactivate the webserver if not required, and if deactivation is supported by the product
MitigationSCALANCE X204RNA EEC (HSR) (6GK5204-0BS00-2NA3)cisa_csaf_ot
Deactivate the webserver if not required, and if deactivation is supported by the product
MitigationSCALANCE X204RNA EEC (PRP) (6GK5204-0BS00-3LA3)cisa_csaf_ot
Deactivate the webserver if not required, and if deactivation is supported by the product
MitigationSCALANCE X204RNA EEC (PRP/HSR) (6GK5204-0BS00-3PA3)cisa_csaf_ot
Deactivate the webserver if not required, and if deactivation is supported by the product

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · CISA US

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-787USCWE-787USCWE-787US

affected products (139)

Products and version ranges known to be affected.

Arista EOSall versionscert_bundDEcpe:/o:arista:arista_eos:4.15
Blue Coat Director 6.1all versionscert_bundDEcpe:/a:bluecoat:director:6.1
Blue Coat ProxyAV 3.5all versionscert_bundDEcpe:/h:bluecoat:proxyav:3.5
Blue Coat ProxySG 6.5all versionscert_bundDEcpe:/h:bluecoat:proxysg:6.5
Blue Coat ProxySG 6.6all versionscert_bundDEcpe:/h:bluecoat:proxysg:6.6
Cisco ACEall versionscert_bundDEcpe:/a:cisco:application_control_engine_software:a1%287%29
Cisco Advanced Malware Protectionall versionscert_bundDEcpe:/h:cisco:advanced_malware_protection:-
Cisco Aironet Access Pointall versionscert_bundDEcpe:/h:cisco:aironet_3500:-
Cisco AnyConnect Secure Mobility Solutionall versionscert_bundDEcpe:/a:cisco:anyconnect_secure_mobility_client:2.0
Cisco Application Networking Managerall versionscert_bundDEcpe:/a:cisco:application_networking_manager:-
Cisco Digital Media Managerall versionscert_bundDEcpe:/a:cisco:digital_media_manager:-
Cisco Email Security Applianceall versionscert_bundDEcpe:/h:cisco:email_security_appliance:-
Cisco Emergency Responder (ER)all versionscert_bundDEcpe:/a:cisco:emergency_responder:-
Cisco IOSall versionscert_bundDEcpe:/o:cisco:ios:10.0
Cisco IOS XEall versionscert_bundDEcpe:/o:cisco:ios_xe:3.1.0s
Cisco IP Phoneall versionscert_bundDEcpe:/h:cisco:ip_phone:-
Cisco Intrusion Prevention System (IPS)all versionscert_bundDEcpe:/h:cisco:intrusion_prevention_system:-
Cisco MDS 9000all versionscert_bundDEcpe:/o:cisco:mds_9000:-
Cisco Network Analysis Moduleall versionscert_bundDEcpe:/h:cisco:network_analysis_module:-
Cisco Nexus 1000Vall versionscert_bundDEcpe:/h:cisco:nexus_1000v:-

showing 20 of 139

advisories (6)

Vendor and ecosystem advisories describing this.

SSA-412672SSA-412672: Multiple OpenSSL and OpenSSH Vulnerabilities in SCALANCE X-200RNA Switch Devices before V3.2.72022-12-13csaf · siemens_psirtDE
SCALANCE X-200RNA switch devices before V3.2.7 contain multiple OpenSSL and OpenSSH vulnerabilities. The most severe of these vulnerabilities could allow a denial of service condition or could lead to execution of arbitrary code. Siemens has released updates for the affected products and recommends to update to the latest versions.
WID-SEC-W-2024-0209OpenSSL: Mehrere SchwachstellenDeutsch2016-09-22csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in OpenSSL ausnutzen, um Sicherheitsvorkehrungen zu umgehen, einen Denial of Service Angriff durchzuführen oder vertrauliche Informationen offenzulegen.
WID-SEC-W-2024-0210OpenSSL: Mehrere Schwachstellen ermöglichen Denial of ServiceDeutsch2016-09-18csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in OpenSSL ausnutzen, um einen Denial of Service Angriff durchzuführen.
WID-SEC-W-2024-1277Oracle Fusion Middleware: Mehrere SchwachstellenDeutsch2017-04-18csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Oracle Fusion Middleware ausnutzen, um dadurch die Integrität, Vertraulichkeit und Verfügbarkeit zu gefährden.
WID-SEC-W-2026-0180Dell Data Protection Advisor: Mehrere SchwachstellenDeutsch2026-01-20csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Dell Data Protection Advisor ausnutzen, um beliebigen Code auszuführen, einen Denial-of-Service-Zustand zu erzeugen, Sicherheitsmaßnahmen zu umgehen und nicht näher spezifizierte Angriffe zu starten.
ICSA-22-349-21Siemens SCALANCE X-200RNA Switch Devices2022-12-13icsa · cisa_csaf_otUS
SCALANCE X-200RNA switch devices before V3.2.7 contain multiple OpenSSL and OpenSSH vulnerabilities. The most severe of these vulnerabilities could allow a denial of service condition or could lead to execution of arbitrary code. Siemens has released updates for the affected products and recommends to update to the latest versions.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund siemens_psirt cisa_csaf_ot NVD CVE.org MITRE

published 2016-09-16modified 2026-06-17

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+16119 more

references (64)

External citations — patches, advisories, analysis.

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