CVE-2021-1473
CriticalExploitedPublic exploitMultiple vulnerabilities exist in the web-based management interface of Cisco Small Business RV Series Routers.
Published Feb 3, 2022 · Updated Nov 8, 2024
Key Facts
Patch immediately- CVE-2021-1473 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Rv340 Firmware (Cisco), Rv340w Firmware (Cisco), Rv345 Firmware (Cisco) and 2 more products.
- It is exploited in the wild, listed in Industry KEV feed since Oct 7, 2021. Public exploit code is available.
- EPSS estimates a 64% probability of exploitation in the next 30 days.
- Fixed versions are available, including Rv340 Firmware 1.0.03.21, Rv340w Firmware 1.0.03.21, Rv345 Firmware 1.0.03.21.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
64%
Higher than 99.2% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2021-1473 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Multiple vulnerabilities exist in the web-based management interface of Cisco Small Business RV Series Routers. A remote attacker could execute arbitrary commands or bypass authentication and upload files on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Oct 7, 2021 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
5 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Rv340 FirmwareCisco | See advisory | 1.0.03.21 |
| Rv340w FirmwareCisco | See advisory | 1.0.03.21 |
| Rv345 FirmwareCisco | See advisory | 1.0.03.21 |
| Rv345p FirmwareCisco | See advisory | 1.0.03.21 |
| Cisco Small Business RV Series Router Firmware | >= n/a | n/a |
Patched Releases
Rv340 Firmware
1.0.03.21
Rv340w Firmware
1.0.03.21
Rv345 Firmware
1.0.03.21
Rv345p Firmware
1.0.03.21
Timeline
Added to Industry KEV feed
Oct 7, 2021
Publicly disclosed
Feb 3, 2022
Last updated
Nov 8, 2024
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
- advisoryhttps://cxsecurity.com/issue/WLB-2022020006
- advisory20210419 [CVE-2021-1472/CVE-2021-1473] Cisco RV Series Authentication Bypass and Remote Command Execution
- advisoryhttps://github.com/rapid7/metasploit-framework
- advisoryhttps://metasploit.com/download
- advisoryhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-inf-disc-wCxZNjL2
FAQ
Common Questions.
Multiple vulnerabilities exist in the web-based management interface of Cisco Small Business RV Series Routers.
Affected: Rv340 Firmware (Cisco); Rv340w Firmware (Cisco); Rv345 Firmware (Cisco), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Oct 7, 2021.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Rv340 Firmware 1.0.03.21, Rv340w Firmware 1.0.03.21, Rv345 Firmware 1.0.03.21.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2021-1473 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo