CVE-2022-20700 | Cisco Small Business RV Series Routers Vulnerabilities

Exp

Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an attacker to do any of the following: Execute arbitrary code Elevate privileges Execute arbitrary commands Bypass authentication and authorization protections Fetch and run unsigned software Cause denial of service (DoS) For more information about these vulnerabilities, see the Details section of this advisory.

Published: 2022-02-10 Last update: 2025-10-28 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-20700 is rated Critical Active Threat (100/100): CVSS Critical severity, with high exploitation likelihood (EPSS 28.60%, 97th percentile). CISA KEV confirms active exploitation (added 2022-03-03) affecting Cisco / Small Business RV160, RV260, RV340, and RV345 Series Routers. a weakness (CWE-121) Unauthenticated remote administrative access may be possible. EPSS rose +2.76% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

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

CISA KEV Record for CVE-2022-20700

Name: Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability · CISA KEV detail

Exploit added: 2022-03-03

Action due: 2022-03-17

Required action: Apply updates per vendor instructions.

Exploit prediction scoring system (EPSS) score for CVE-2022-20700

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 2026-05-10 25.84% 28.60% +2.76%
2 2026-05-05 21.75% 25.84% +4.09%
3 2025-12-23 — 21.75% —

Full EPSS history (23 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-20700

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/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: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: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.
 3.9 6.0 [email protected]
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]
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2022-20700

Affected software / configurations for CVE-2022-20700

Vendor Product Version Raw CPE
cisco rv340_firmware <= 1.0.03.24 cpe:2.3:o:cisco:rv340_firmware:*:*:*:*:*:*:*:*
cisco rv340w_firmware <= 1.0.03.24 cpe:2.3:o:cisco:rv340w_firmware:*:*:*:*:*:*:*:*
cisco rv345_firmware <= 1.0.03.24 cpe:2.3:o:cisco:rv345_firmware:*:*:*:*:*:*:*:*
cisco rv345p_firmware <= 1.0.03.24 cpe:2.3:o:cisco:rv345p_firmware:*:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*:*

References for CVE-2022-20700

cvelogic Threat Intelligence