CVE-2022-20841 [Critical] | Denial of Service in Rv160 Firmware

Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an unauthenticated, remote attacker to execute arbitrary code or cause a denial of service (DoS) condition on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-05-05	2.89%	3.57%	+0.68%
2	2025-11-21	3.63%	2.89%	-0.74%
3	2025-11-18	—	3.63%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-05-05

2.89%

3.57%

+0.68%

2025-11-21

3.63%

2.89%

-0.74%

2025-11-18

—

3.63%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.0	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/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: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:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. 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.	2.2	6.0	[email protected]
9.0	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/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: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:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. 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.	2.2	6.0	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.0

3.1

CRITICAL

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/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: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:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
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.

2.2

6.0

[email protected]

9.0

3.1

CRITICAL

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/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: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:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
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.

2.2

6.0

[email protected]

Affected software / configurations for CVE-2022-20841

Vendor	Product	Version	Raw CPE
cisco	rv160_firmware	< 1.0.01.05	cpe:2.3:o:cisco:rv160_firmware::::::::
cisco	rv160w_firmware	< 1.0.01.05	cpe:2.3:o:cisco:rv160w_firmware::::::::
cisco	rv260_firmware	< 1.0.01.05	cpe:2.3:o:cisco:rv260_firmware::::::::
cisco	rv260p_firmware	< 1.0.01.05	cpe:2.3:o:cisco:rv260p_firmware::::::::
cisco	rv260w_firmware	< 1.0.01.05	cpe:2.3:o:cisco:rv260w_firmware::::::::
cisco	rv340_firmware	< 1.0.03.26	cpe:2.3:o:cisco:rv340_firmware::::::::
cisco	rv340w_firmware	< 1.0.03.26	cpe:2.3:o:cisco:rv340w_firmware::::::::
cisco	rv345_firmware	< 1.0.03.26	cpe:2.3:o:cisco:rv345_firmware::::::::
cisco	rv345p_firmware	< 1.0.03.26	cpe:2.3:o:cisco:rv345p_firmware::::::::

References for CVE-2022-20841

URL	Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb-mult-vuln-CbVp4SUR	Vendor Advisory

URL

CVE-2022-20841 | Cisco Small Business RV Series Routers Vulnerabilities

Exploit prediction scoring system (EPSS) score for CVE-2022-20841

Common vulnerability scoring system (CVSS) metrics for CVE-2022-20841

Weakness enumeration for CVE-2022-20841

Affected software / configurations for CVE-2022-20841

References for CVE-2022-20841