CVE-2023-20200
CVE-2023-20200 is a high-severity vulnerability in Cisco Firepower 9300 Firmware with a CVSS 3.x base score of 7.7. 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-732.
Key facts
- Severity: High (CVSS 3.x base score 7.7)
- EPSS exploit prediction: 1% (40th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-732
- Affected product: Cisco Firepower 9300 Firmware
- Published:
- Last modified:
Description
A vulnerability in the Simple Network Management Protocol (SNMP) service of Cisco FXOS Software for Firepower 4100 Series and Firepower 9300 Security Appliances and of Cisco UCS 6300 Series Fabric Interconnects could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to the improper handling of specific SNMP requests. An attacker could exploit this vulnerability by sending a crafted SNMP request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: This vulnerability affects all supported SNMP versions. To exploit this vulnerability through SNMPv2c or earlier, an attacker must know the SNMP community string that is configured on an affected device. To exploit this vulnerability through SNMPv3, the attacker must have valid credentials for an SNMP user who is configured on the affected device.
Frequently asked questions
- What is CVE-2023-20200?
- A vulnerability in the Simple Network Management Protocol (SNMP) service of Cisco FXOS Software for Firepower 4100 Series and Firepower 9300 Security Appliances and of Cisco UCS 6300 Series Fabric Interconnects could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to the improper handling of specific SNMP requests. An attacker could exploit this vulnerability by sending a crafted SNMP request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: This vulnerability affects all supported SNMP versions. To exploit this vulnerability through SNMPv2c or earlier, an attacker must know the SNMP community string that is configured on an affected device. To exploit this vulnerability through SNMPv3, the attacker must have valid credentials for an SNMP user who is configured on the affected device.
- How severe is CVE-2023-20200?
- CVE-2023-20200 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2023-20200 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-20200?
- CVE-2023-20200 primarily affects Cisco Firepower 9300 Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2023-20200?
- 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-2023-20200 published?
- CVE-2023-20200 was published on 2023-08-23 and last updated on 2026-06-17.
References
Affected products (8)
- cpe:2.3:o:cisco:firepower_9300_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:firepower_4143_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:firepower_4112_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ucs_6324_fabric_interconnect_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:firepower_4125_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:firepower_4115:-:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ucs_6332_fabric_interconnect_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ucs_6332-16up_fabric_interconnect_firmware:*:*:*:*:*:*:*:*
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