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CVE-2021-1334

22
FAUCET Score

CVE-2021-1334 describes multiple vulnerabilities in the web-based management interface of several Cisco Small Business RV series routers, including RV016, RV042, RV042G, RV082, RV320, and RV325. These flaws stem from improper input validation, allowing an authenticated, remote attacker to execute arbitrary code as root or trigger a denial of service. With a CVSS score of 7.2 (HIGH), the vulnerability requires valid administrator credentials but has a low attack complexity, potentially leading to full system compromise or device reloads. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.2.3.14CPE matchmatch criteria
cpe:2.3:o:cisco:rv016_multi-wan_vpn_router_firmware:*:*:*:*:*:*:*:*
<= 4.2.3.14CPE matchmatch criteria
cpe:2.3:o:cisco:rv042_dual_wan_vpn_router_firmware:*:*:*:*:*:*:*:*
<= 4.2.3.14CPE matchmatch criteria
cpe:2.3:o:cisco:rv042g_dual_gigabit_wan_vpn_router_firmware:*:*:*:*:*:*:*:*
<= 4.2.3.14CPE matchmatch criteria
cpe:2.3:o:cisco:rv082_dual_wan_vpn_router_firmware:*:*:*:*:*:*:*:*
<= 1.5.1.11CPE matchmatch criteria
cpe:2.3:o:cisco:rv320_dual_gigabit_wan_vpn_router_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.75%
Probability of exploitation in next 30 days
EPSS Percentile
84.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0275 is in the 82nd percentile among its peer group of 5,538 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-overflow-ghZP68yj
Vendor Advisory