vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2020-3190

Cisco IOS XR Software IPsec Packet Processor Denial of Service Vulnerability

MEDIUM
5.8
CVSS Score
Published: March 4, 2020 at 06:35 PM UTC
Updated: June 17, 2026 at 03:17 AM UTC
1 product affected across 1 vendorIOS Xr

Using Cisco IOS XR Software by Cisco?

Get instant alerts when new vulnerabilities affect Cisco IOS XR Software - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM5.8
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

A vulnerability in the IPsec packet processor of Cisco IOS XR Software could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition for IPsec sessions to an affected device. The vulnerability is due to improper handling of packets by the IPsec packet processor. An attacker could exploit this vulnerability by sending malicious ICMP error messages to an affected device that get punted to the IPsec packet processor. A successful exploit could allow the attacker to deplete IPsec memory, resulting in all future IPsec packets to an affected device being dropped by the device. Manual intervention is required to recover from this situation.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

IOS Xr· Cisco
95%
v < 6.4.36.6.0 ≤ v < 6.6.37.0.0 ≤ v < 7.0.27.1.0 ≤ v < 7.1.1
Affected range stops below 6.4.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.6.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.0.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.1.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisoryx_refsource_CISCO
Source: [email protected]
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-ipsec-dos-q8UPX6m

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.8MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card