CVE-2012-2488

What it is

Cisco IOS XR before 4.2.1 on ASR 9000 series devices and CRS series devices allows remote attackers to cause a denial of service (packet transmission outage) via a crafted packet, aka Bug IDs CSCty94537 and CSCtz62593.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

2.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2012-05-31 10:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:41 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.2% in the next 30 days (EPSS).
• Severity: 7.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2012-05-31 10:17 UTC

Last modified

2026-06-16 23:41 UTC

Exploit probability

2.2% · EPSS, next 30 days

Weakness

CWE-20 · Improper input validation

Record status

Modified

Affected

• Cisco iOS Xr ≤ 4.2.0
• Cisco Asr 9000 rsp440 Router
• Cisco iOS Xr 4.0.3
• Cisco iOS Xr 4.0.4
• Cisco iOS Xr 4.1
• Cisco iOS Xr 4.1.1
• Cisco iOS Xr 4.1.2
• Cisco iOS Xr 4.2.0

Attack profile CVSS 2.0 · 7.8

Attack vector

Network

Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

Is it in your code?

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