CVE-2023-20079 | Cisco IP Phone 6800, 7800, 7900, and 8800 Series Web UI Vulnerabilities

Multiple vulnerabilities in the web-based management interface of certain Cisco IP Phones could allow an unauthenticated, remote attacker to execute arbitrary code or cause a denial of service (DoS) condition. For more information about these vulnerabilities, see the Details section of this advisory.

Published: 2023-03-03 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-20079 is rated High Risk (77.5/100): CVSS Critical severity, with high exploitation likelihood (EPSS 10.31%, 95th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +6.10% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-20079

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 4.21% 10.31% +6.10%
2 2026-04-02 3.82% 4.21% +0.39%
3 2026-03-24 — 3.82% —

Full EPSS history (23 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-20079

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2023-20079

Affected software / configurations for CVE-2023-20079

Vendor Product Version Raw CPE
cisco ip_phone_6871_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_6871_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_6861_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_6861_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_6851_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_6851_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_6841_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_6841_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_6825_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_6825_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_7861_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_7861_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_7841_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_7841_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_7832_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_7832_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_7821_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_7821_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_7811_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_7811_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_8865_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_8865_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_8861_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_8861_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_8851_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_8851_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_8845_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_8845_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_8841_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_8841_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_8832_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_8832_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_8811_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_8811_firmware:*:*:*:*:*:*:*:*
cisco ip_phone_8831_firmware < 11.3.7sr1 cpe:2.3:o:cisco:ip_phone_8831_firmware:*:*:*:*:*:*:*:*
cisco unified_ip_phone_7945g_firmware < 11.3.7sr1 cpe:2.3:o:cisco:unified_ip_phone_7945g_firmware:*:*:*:*:*:*:*:*
cisco unified_ip_phone_7965g_firmware < 11.3.7sr1 cpe:2.3:o:cisco:unified_ip_phone_7965g_firmware:*:*:*:*:*:*:*:*
cisco unified_ip_phone_7975g_firmware < 11.3.7sr1 cpe:2.3:o:cisco:unified_ip_phone_7975g_firmware:*:*:*:*:*:*:*:*

References for CVE-2023-20079

cvelogic Threat Intelligence