How severe is CVE-2008-3818?

CVE-2008-3818 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2008-3818 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-3818?

CVE-2008-3818 primarily affects Cisco Ons. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-3818?

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-2008-3818 published?

CVE-2008-3818 was published on 2009-01-16 and last updated on 2026-06-16.

CVE-2008-3818

CVE-2008-3818 is a high-severity vulnerability in Cisco Ons with a CVSS 2.0 base score of 7.8. 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 7.8)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Ons
Published: 2009-01-16
Last modified: 2026-06-16

Description

Cisco ONS 15310-CL, 15310-MA, 15327, 15454, 15454 SDH, and 15600 with software 7.0.2 through 7.0.6, 7.2.2, 8.0.x, 8.5.1, and 8.5.2 allows remote attackers to cause a denial of service (control-card reset) via a crafted TCP session.

Frequently asked questions

What is CVE-2008-3818?: Cisco ONS 15310-CL, 15310-MA, 15327, 15454, 15454 SDH, and 15600 with software 7.0.2 through 7.0.6, 7.2.2, 8.0.x, 8.5.1, and 8.5.2 allows remote attackers to cause a denial of service (control-card reset) via a crafted TCP session.
How severe is CVE-2008-3818?: CVE-2008-3818 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2008-3818 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-3818?: CVE-2008-3818 primarily affects Cisco Ons. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-3818?: 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-2008-3818 published?: CVE-2008-3818 was published on 2009-01-16 and last updated on 2026-06-16.

References

Affected products (10)

cpe:2.3:a:cisco:ons:7.0.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ons:7.0.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ons:7.0.5:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ons:7.2.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ons:7.2.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ons:8.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ons:8.5.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ons:8.5.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ons:8.5.2:*:*:*:*:*:*:*
cpe:2.3:h:cisco:ons_15600:*:*:*:*:*:*:*:*

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