How severe is CVE-2013-6703?

CVE-2013-6703 has a CVSS 2.0 base score of 7.1, rated high severity.

Is CVE-2013-6703 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-6703?

CVE-2013-6703 affects Cisco Ons 15454. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-6703?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2013-6703 published?

CVE-2013-6703 was published on 2013-12-03 and last updated on 2026-06-17.

CVE-2013-6703

CVE-2013-6703 is a high-severity vulnerability in Cisco Ons 15454 with a CVSS 2.0 base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 2.0 base score 7.1)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Ons 15454
Published: 2013-12-03
Last modified: 2026-06-17

Description

The TLS/SSLv3 module on Cisco ONS 15454 controller cards allows remote attackers to cause a denial of service (card reset) via crafted (1) TLS or (2) SSLv3 packets, aka Bug ID CSCuh34787.

Frequently asked questions

What is CVE-2013-6703?: The TLS/SSLv3 module on Cisco ONS 15454 controller cards allows remote attackers to cause a denial of service (card reset) via crafted (1) TLS or (2) SSLv3 packets, aka Bug ID CSCuh34787.
How severe is CVE-2013-6703?: CVE-2013-6703 has a CVSS 2.0 base score of 7.1, rated high severity.
Is CVE-2013-6703 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-6703?: CVE-2013-6703 affects Cisco Ons 15454. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-6703?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2013-6703 published?: CVE-2013-6703 was published on 2013-12-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:h:cisco:ons_15454:*:*:*:*:*:*:*:*

More vulnerabilities in Cisco Ons 15454

CVE-2014-2142 — Medium (CVSS 5.0): Cisco ONS 15454 controller cards with software 10.0 and earlier allow remote attackers to cause a denial of service…
CVE-2014-2140 — Medium (CVSS 5.0): Cisco ONS 15454 controller cards with software 9.6 and earlier allow remote attackers to cause a denial of service…
CVE-2014-2139 — Medium (CVSS 5.0): Cisco ONS 15454 controller cards with software 9.6 and earlier allow remote attackers to cause a denial of service…
CVE-2013-6701 — Medium (CVSS 5.0): The tNetTaskLimit process on the Transport Node Controller (TNC) on Cisco ONS 15454 devices with software 9.6 and…
CVE-2013-6702 — Medium (CVSS 4.3): The management implementation on Cisco ONS 15454 controller cards with software 9.8 and earlier allows remote attackers…
CVE-2014-2141 — Medium (CVSS 4.0): The session-termination functionality on Cisco ONS 15454 controller cards with software 9.6 and earlier does not…

All CVEs affecting Cisco Ons 15454 →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →