No exploitation reported

CVE-2020-3296

No exploitation reported by the sources we read.

Published2020-06-18
WeaknessCWE-119 · CWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV320 and RV325 Series Routers and Cisco Small Business RV016, RV042, and RV082 Routers could allow an authenticated, remote attacker with administrative privileges to execute arbitrary code on an affected device. The vulnerabilities are due to insufficient boundary restrictions on user-supplied input to scripts in the web-based management interface. An attacker with administrative privileges that are sufficient to log in to the web-based management interface could exploit each vulnerability by sending crafted requests that contain overly large values to an affected device, causing a stack overflow. A successful exploit could allow the attacker to cause the device to crash or allow the attacker to execute arbitrary code with root privileges on the underlying operating system.

Timeline

dates in UTC

2020-06-1803:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-3296?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-3296?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Cisco rv016 firmwareversion to verify

Branch	Affected	Fixed in	Source
4.2	≤ 4.2.3.10	no fix published	NVD

Cisco rv042 firmwareversion to verify

Branch	Affected	Fixed in	Source
4.2	≤ 4.2.3.10	no fix published	NVD

Cisco rv042g firmwareversion to verify

Branch	Affected	Fixed in	Source
4.2	≤ 4.2.3.10	no fix published	NVD

3 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

tools.cisco.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2024-11-15
OpenCVESSVC decisionnone—
NVDCVSS 3.17.2read 2026-10-23
CNACVSS 3.07.2read 2026-10-23
NVDCVSS 2.09read 2026-10-23
CNAweakness (CWE)CWE-119read 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score3.2 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published: 2020-06-18
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-3296?

Is CVE-2020-3296 actively exploited?

Active exploitation of CVE-2020-3296 has not been confirmed. Its EPSS score was 3.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-3296?

CVE-2020-3296 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

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