CVE-2022-20774 [Medium] | Denial of Service in Ip Phone 6871 Firmware

A vulnerability in the web-based management interface of Cisco IP Phone 6800, 7800, and 8800 Series with Multiplatform Firmware could allow an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack against a user of the web-based interface of an affected system. This vulnerability is due to insufficient CSRF protections for the web-based management interface of an affected device. An attacker could exploit this vulnerability by persuading an authenticated user of the interface to follow a crafted link. A successful exploit could allow the attacker to perform configuration changes on the affected device, resulting in a denial of service (DoS) condition.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.25%	0.37%	+0.12%
2	2025-11-21	0.16%	0.25%	+0.09%
3	2025-11-18	—	0.16%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.25%

0.37%

+0.12%

2025-11-21

0.16%

0.25%

+0.09%

2025-11-18

—

0.16%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.8	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/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:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. 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: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.	1.6	5.2	[email protected]
8.1	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. 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: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.	2.8	5.2	[email protected]
4.9	2.0	MEDIUM	`AV:N/AC:M/Au:S/C:N/I:P/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:S) A single authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	6.8	4.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

6.8

3.1

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/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:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
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: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.

1.6

5.2

[email protected]

8.1

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
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: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.

2.8

5.2

[email protected]

4.9

2.0

MEDIUM

AV:N/AC:M/Au:S/C:N/I:P/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:S): A single authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

6.8

4.9

[email protected]

Affected software / configurations for CVE-2022-20774

Vendor	Product	Version	Raw CPE
cisco	ip_phone_6871_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_6871_firmware::::::::
cisco	ip_phone_6861_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_6861_firmware::::::::
cisco	ip_phone_6851_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_6851_firmware::::::::
cisco	ip_phone_6841_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_6841_firmware::::::::
cisco	ip_phone_6825_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_6825_firmware::::::::
cisco	ip_phone_7861_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_7861_firmware::::::::
cisco	ip_phone_7841_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_7841_firmware::::::::
cisco	ip_phone_7832_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_7832_firmware::::::::
cisco	ip_phone_7821_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_7821_firmware::::::::
cisco	ip_phone_7811_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_7811_firmware::::::::
cisco	ip_phone_8865_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_8865_firmware::::::::
cisco	ip_phone_8861_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_8861_firmware::::::::
cisco	ip_phone_8851_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_8851_firmware::::::::
cisco	ip_phone_8845_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_8845_firmware::::::::
cisco	ip_phone_8841_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_8841_firmware::::::::
cisco	ip_phone_8832_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_8832_firmware::::::::
cisco	ip_phone_8811_firmware	< 11.3.5	cpe:2.3:o:cisco:ip_phone_8811_firmware::::::::

References for CVE-2022-20774

URL	Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phone-csrf-K56vXvVx	Vendor Advisory

URL

CVE-2022-20774 | Cisco IP Phone 6800, 7800, and 8800 Series with Multiplatform Firmware Cross-Site Request Forgery Vulnerability

Exploit prediction scoring system (EPSS) score for CVE-2022-20774

Common vulnerability scoring system (CVSS) metrics for CVE-2022-20774

Weakness enumeration for CVE-2022-20774

Affected software / configurations for CVE-2022-20774

References for CVE-2022-20774