How severe is CVE-2009-0623?

CVE-2009-0623 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2009-0623 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0623?

CVE-2009-0623 primarily affects Cisco Ace 4710. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0623?

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-2009-0623 published?

CVE-2009-0623 was published on 2009-02-26 and last updated on 2026-06-16.

CVE-2009-0623

CVE-2009-0623 is a high-severity vulnerability in Cisco Ace 4710 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.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Ace 4710
Published: 2009-02-26
Last modified: 2026-06-16

Description

Unspecified vulnerability in Cisco ACE Application Control Engine Module for Catalyst 6500 Switches and 7600 Routers before A2(1.3) and Cisco ACE 4710 Application Control Engine Appliance before A3(2.1) allows remote attackers to cause a denial of service (device reload) via a crafted SSH packet.

Frequently asked questions

What is CVE-2009-0623?: Unspecified vulnerability in Cisco ACE Application Control Engine Module for Catalyst 6500 Switches and 7600 Routers before A2(1.3) and Cisco ACE 4710 Application Control Engine Appliance before A3(2.1) allows remote attackers to cause a denial of service (device reload) via a crafted SSH packet.
How severe is CVE-2009-0623?: CVE-2009-0623 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2009-0623 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0623?: CVE-2009-0623 primarily affects Cisco Ace 4710. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0623?: 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-2009-0623 published?: CVE-2009-0623 was published on 2009-02-26 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:h:cisco:ace_4710:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:ace_4710:a3\(1.0\):*:*:*:*:*:*:*
cpe:2.3:h:cisco:application_control_engine_module:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:application_control_engine_module:a2\(1.1\):*:*:*:*:*:*:*

More vulnerabilities in Cisco Ace 4710

CVE-2009-0621 — Critical (CVSS 10.0): Cisco ACE 4710 Application Control Engine Appliance before A1(8a) uses default (1) usernames and (2) passwords for (a)…
CVE-2009-0622 — Critical (CVSS 9.0): Unspecified vulnerability in Cisco ACE Application Control Engine Module for Catalyst 6500 Switches and 7600 Routers…
CVE-2010-2825 — High (CVSS 7.8): Unspecified vulnerability in the SIP inspection feature on the Cisco Application Control Engine (ACE) Module with…
CVE-2010-2823 — High (CVSS 7.8): Unspecified vulnerability in the deep packet inspection feature on the Cisco Application Control Engine (ACE) 4710…
CVE-2010-2822 — High (CVSS 7.8): Unspecified vulnerability in the RTSP inspection feature on the Cisco Application Control Engine (ACE) Module with…
CVE-2009-0742 — High (CVSS 7.8): The username command in Cisco ACE Application Control Engine Module for Catalyst 6500 Switches and 7600 Routers and…

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