CVE-2020-3208

Name: CVE-2020-3208
Creator: NVD / NIST
Published: 2020-06-03T18:15:18.87+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.7/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2020-3208 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. A vulnerability in the image verification feature of Cisco IOS Software for Cisco 809 and 829 Industrial Integrated Services Routers (Industrial ISRs) could allow an authenticated, local attacker to boot a malicious software image on an affected device. The vulnerability is due to insufficient access restrictions on the area of code that manages the image verification feature. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

A vulnerability in the image verification feature of Cisco IOS Software for Cisco 809 and 829 Industrial Integrated Services Routers (Industrial ISRs) could allow an authenticated, local attacker to boot a malicious software image on an affected device. The vulnerability is due to insufficient access restrictions on the area of code that manages the image verification feature. An attacker could exploit this vulnerability by first authenticating to the targeted device and then logging in to the Virtual Device Server (VDS) of an affected device. The attacker could then, from the VDS shell, disable Cisco IOS Software integrity (image) verification. A successful exploit could allow the attacker to boot a malicious Cisco IOS Software image on the targeted device. To exploit this vulnerability, the attacker must have valid user credentials at privilege level 15.

Metrics

CVSS 3.1

6.7/10

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

EPSS Probability

0.32%

23.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-264

Affected Software

Vendor	Product	Versions
Cisco	Ios	12.2\(60\)ez16
Cisco	Ios	15.0\(2\)sg11a
Cisco	Ios	15.3\(3\)jaa1
Cisco	Ios	15.3\(3\)jpj
Cisco	Ios	15.5\(3\)m0a
Cisco	Ios	15.5\(3\)m1
Cisco	Ios	15.5\(3\)m2
Cisco	Ios	15.5\(3\)m2a
Cisco	Ios	15.5\(3\)m3
Cisco	Ios	15.5\(3\)m4
Cisco	Ios	15.5\(3\)m4a
Cisco	Ios	15.5\(3\)m5
Cisco	Ios	15.5\(3\)m6
Cisco	Ios	15.5\(3\)m6a
Cisco	Ios	15.5\(3\)m7
Cisco	Ios	15.5\(3\)m8
Cisco	Ios	15.5\(3\)m9
Cisco	Ios	15.5\(3\)m10
Cisco	Ios	15.5\(3\)m11
Cisco	Ios	15.6\(1\)t
Cisco	Ios	15.6\(1\)t0a
Cisco	Ios	15.6\(1\)t1
Cisco	Ios	15.6\(1\)t2
Cisco	Ios	15.6\(1\)t3
Cisco	Ios	15.6\(3\)m
Cisco	Ios	15.6\(3\)m0a
Cisco	Ios	15.6\(3\)m1
Cisco	Ios	15.6\(3\)m1b
Cisco	Ios	15.6\(3\)m2
Cisco	Ios	15.6\(3\)m3
Cisco	Ios	15.6\(3\)m3a
Cisco	Ios	15.6\(3\)m4
Cisco	Ios	15.6\(3\)m5
Cisco	Ios	15.6\(3\)m6
Cisco	Ios	15.6\(3\)m6a
Cisco	Ios	15.6\(3\)m6b
Cisco	Ios	15.6\(3\)m7
Cisco	Ios	15.6\(3\)m8
Cisco	Ios	15.6\(3\)m9
Cisco	Ios	15.7\(3\)m
Cisco	Ios	15.7\(3\)m1
Cisco	Ios	15.7\(3\)m2
Cisco	Ios	15.7\(3\)m3
Cisco	Ios	15.7\(3\)m4
Cisco	Ios	15.7\(3\)m4a
Cisco	Ios	15.7\(3\)m4b
Cisco	Ios	15.7\(3\)m5
Cisco	Ios	15.7\(3\)m6
Cisco	Ios	15.7\(3\)m7
Cisco	Ios	15.8\(3\)m

Showing 50 of 57 affected configurations. See NVD for the full list.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-ir800-img-verif-wHhLYHjKPatch, Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-ir800-img-verif-wHhLYHjKPatch, Vendor Advisory

Timeline

Published: Jun 3, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-3208?

How severe is CVE-2020-3208?

CVE-2020-3208 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2020-3208?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-3208?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST