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CVE-2020-3198

31
FAUCET Score

CVE-2020-3198 describes multiple critical vulnerabilities in Cisco IOS Software affecting Cisco 809/829 Industrial ISRs and Cisco 1000 Series Connected Grid Routers. These flaws allow unauthenticated remote attackers or authenticated local attackers to execute arbitrary code or cause a denial of service. With a CVSS score of 9.8 (Critical), the vulnerabilities are easily exploitable over the network with low attack complexity, leading to complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the CVE has garnered significant community discussion and media coverage, indicating high awareness despite its inactive status on the CISA KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
12.2\(60\)ez16CPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.2\(60\)ez16:*:*:*:*:*:*:*
15.0\(2\)sg11aCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.0\(2\)sg11a:*:*:*:*:*:*:*
15.3\(3\)jaa1CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.3\(3\)jaa1:*:*:*:*:*:*:*
15.3\(3\)jpjCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.3\(3\)jpj:*:*:*:*:*:*:*
15.4\(1\)cgCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.4\(1\)cg:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.47%
Probability of exploitation in next 30 days
EPSS Percentile
90.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0447 is in the 84th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

ciscopatch availablevia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-iot-rce-xYRSeMNH
PatchVendor Advisory