CVE-2022-20700
Cisco — Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability
Cisco · CWE-121 — Stack-based buffer overflow | CWE-787 — Out-of-bounds write · in CISA KEV since 2022-03-03
EVRS 75 of 100 Urgent
Patch This Cycle
Rank 1,100 of 2,960 tracked
Raised to the floor for a confirmed exploited vulnerability.
Why it scores 75
Evidence available: 6 of 7 signalsListed in the CISA KEV catalog, and an EPSS probability of 0.057.
- CISA KEVApplied
- RansomwareDid not apply
- Vendor exploitationDid not apply
- EPSSApplied
- Microsoft Exploitability IndexNot applicable
- Pre-patch disclosureNo data
- KEV recencyDid not apply
- CVSSApplied
The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data
Fix
Patch or fixed version identifiedCISA required action
Fixed in
rv340 firmware: update to a version newer than 1.0.03.24 | rv340w firmware: update to a version newer than 1.0.03.24 | rv345 firmware: update to a version newer than 1.0.03.24 | rv345p firmware: update to a version newer than 1.0.03.24 | rv160 firmware: update to a version newer than 1.0.01.05 | rv160w firmware: update to a version newer than 1.0.01.05
Affected versions
- rv340 firmware
<= 1.0.03.24 - rv340w firmware
<= 1.0.03.24 - rv345 firmware
<= 1.0.03.24 - rv345p firmware
<= 1.0.03.24 - rv160 firmware
<= 1.0.01.05 - rv160w firmware
<= 1.0.01.05 - rv260 firmware
<= 1.0.01.05 - rv260p firmware
<= 1.0.01.05
+10 more affected products; see the full list at NVD.
Remediation
Apply updates per vendor instructions.
Fixed versions from NVD.
Evidence
Each value with its source| Measure | Value | Source |
|---|---|---|
| CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. | 9.8 | NVD |
| FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. | 0.057 (92.9th pctl) | FIRST EPSS |
| Actively exploitedWhether a source of record has confirmed attacks using it in the wild. | Confirmed | CISA KEV |
| Ransomware campaign useWhether CISA has seen ransomware operators use it. | Unknown or none | CISA KEV |
| CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. | 2022-03-17 · KEV since 2022 · listed over a year | CISA KEV |
| Public exploit moduleA module existing is not the same as active exploitation. | None known | Metasploit |
| EUVD cross-referenceENISA's record: CVSS 10.0 (v3.1), assigned by cisco. | Listed | ENISA EUVD |
Description
NVDMultiple 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.
What CISA says to do