CVE-2022-20691
CVE-2022-20691 is a medium-severity vulnerability in Cisco Ata 190 Firmware with a CVSS 3.x base score of 5.3. 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-1284.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- EPSS exploit prediction: 1% (46th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-1284
- Affected product: Cisco Ata 190 Firmware
- Published:
- Last modified:
Description
A vulnerability in the Cisco Discovery Protocol functionality of Cisco ATA 190 Series Adaptive Telephone Adapter firmware could allow an unauthenticated, adjacent attacker to cause a DoS condition of an affected device. This vulnerability is due to missing length validation of certain Cisco Discovery Protocol packet header fields. An attacker could exploit this vulnerability by sending crafted Cisco Discovery Protocol packets to an affected device. A successful exploit could allow the attacker to cause the device to exhaust available memory and cause the service to restart. Cisco has released firmware updates that address this vulnerability.
Frequently asked questions
- What is CVE-2022-20691?
- A vulnerability in the Cisco Discovery Protocol functionality of Cisco ATA 190 Series Adaptive Telephone Adapter firmware could allow an unauthenticated, adjacent attacker to cause a DoS condition of an affected device. This vulnerability is due to missing length validation of certain Cisco Discovery Protocol packet header fields. An attacker could exploit this vulnerability by sending crafted Cisco Discovery Protocol packets to an affected device. A successful exploit could allow the attacker to cause the device to exhaust available memory and cause the service to restart. Cisco has released firmware updates that address this vulnerability.
- How severe is CVE-2022-20691?
- CVE-2022-20691 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
- Is CVE-2022-20691 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2022-20691?
- CVE-2022-20691 primarily affects Cisco Ata 190 Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2022-20691?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2022-20691 published?
- CVE-2022-20691 was published on 2022-12-12 and last updated on 2026-06-17.
References
Affected products (9)
- cpe:2.3:o:cisco:ata_190_firmware:-:*:*:*:on-premises:*:*:*
- cpe:2.3:o:cisco:ata_191_firmware:*:*:*:*:multiplatform:*:*:*
- cpe:2.3:o:cisco:ata_191_firmware:*:*:*:*:on-premises:*:*:*
- cpe:2.3:o:cisco:ata_191_firmware:12.0.1:-:*:*:on-premises:*:*:*
- cpe:2.3:o:cisco:ata_191_firmware:12.0.1:sr1:*:*:on-premises:*:*:*
- cpe:2.3:o:cisco:ata_191_firmware:12.0.1:sr2:*:*:on-premises:*:*:*
- cpe:2.3:o:cisco:ata_191_firmware:12.0.1:sr3:*:*:on-premises:*:*:*
- cpe:2.3:o:cisco:ata_191_firmware:12.0.1:sr4:*:*:on-premises:*:*:*
- cpe:2.3:o:cisco:ata_192_firmware:*:*:*:*:multiplatform:*:*:*
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