CVE-2019-1765
CVE-2019-1765 is a high-severity vulnerability in Cisco Ip Phone 8821 Firmware with a CVSS 3.x base score of 8.1. 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-22.
Key facts
- Severity: High (CVSS 3.x base score 8.1)
- CVSS v2: 4.0
- EPSS exploit prediction: 1% (69th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-22
- Affected product: Cisco Ip Phone 8821 Firmware
- Published:
- Last modified:
Description
A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone 8800 Series could allow an authenticated, remote attacker to write arbitrary files to the filesystem. The vulnerability is due to insufficient input validation and file-level permissions. An attacker could exploit this vulnerability by uploading invalid files to an affected device. A successful exploit could allow the attacker to write files in arbitrary locations on the filesystem. This vulnerability affects Cisco IP Phone 8800 Series products running a SIP Software release prior to 11.0(5) for Wireless IP Phone 8821 and 8821-EX; and 12.5(1)SR1 for the IP Conference Phone 8832 and the rest of the IP Phone 8800 Series.
Frequently asked questions
- What is CVE-2019-1765?
- A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone 8800 Series could allow an authenticated, remote attacker to write arbitrary files to the filesystem. The vulnerability is due to insufficient input validation and file-level permissions. An attacker could exploit this vulnerability by uploading invalid files to an affected device. A successful exploit could allow the attacker to write files in arbitrary locations on the filesystem. This vulnerability affects Cisco IP Phone 8800 Series products running a SIP Software release prior to 11.0(5) for Wireless IP Phone 8821 and 8821-EX; and 12.5(1)SR1 for the IP Conference Phone 8832 and the rest of the IP Phone 8800 Series.
- How severe is CVE-2019-1765?
- CVE-2019-1765 has a CVSS 3.x base score of 8.1, 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 high, and availability high.
- Is CVE-2019-1765 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-1765?
- CVE-2019-1765 primarily affects Cisco Ip Phone 8821 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2019-1765?
- 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-2019-1765 published?
- CVE-2019-1765 was published on 2019-03-22 and last updated on 2026-06-17.
References
Affected products (4)
- cpe:2.3:o:cisco:ip_phone_8821_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ip_phone_8821-ex_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ip_conference_phone_8832_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ip_phone_8800_firmware:*:*:*:*:*:*:*:*
More vulnerabilities in Cisco Ip Phone 8821 Firmware
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- CVE-2019-1764 — High (CVSS 8.1): A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone…
- CVE-2025-20350 — High (CVSS 7.5): A vulnerability in the web UI of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video…
- CVE-2019-1763 — High (CVSS 7.5): A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone…
- CVE-2019-1716 — High (CVSS 7.5): A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone…
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