CVE-1999-1466
— NVD-CWE-Other
EPSS 2.3%
- Published: 1992-12-10T05:00:00.000
- Last modified: 2025-04-03T01:03:51.193
- CWE: NVD-CWE-Other
Vulnerability in Cisco routers versions 8.2 through 9.1 allows remote attackers to bypass access control lists when extended IP access lists are used on certain interfaces, the IP route cache is enabled, and the access list uses the “established” keyword.
Related CVE by CWE
No related CWE found.
Top CVE for Vendor
No vendor taxonomy on this entry.
Recently Exploited Similar Vulnerabilities
No recent KEV-listed items for this vendor/product.
How to fix CVE-1999-1466
CVE-1999-1466 is a unknown severity vulnerability affecting the affected product.
Description: Vulnerability in Cisco routers versions 8.2 through 9.1 allows remote attackers to bypass access control lists when extended IP access lists are used on certain interfaces, the IP route cache is enabled, and the access list uses the “established” keyword. Related CVE by CWENo related CWE found.Top CVE for VendorNo vendor taxonomy on this entry.Recently […]
Affected Versions:
❌ Vulnerable: 8.2 - 9.1
✅ Safe: ≥ 9.2
Exploit Difficulty: HARD
⏱️ Time to exploit: > 4 hours
🛠️ Required skills: Advanced security expertise
💰 Public exploits: Rare or not public
How to Fix:
- Check if you're running the affected product
- Verify version (vulnerable: 8.2 - 9.1)
- Update to ≥ 9.2 or later
- If patching is not immediately possible: restrict network exposure, apply least-privilege access
- Test the fix in a staging environment first
- Review logs for signs of exploitation
- Monitor for IOCs (Indicators of Compromise)
- Enable automatic security updates
- Set up vulnerability monitoring
- Review and harden security configurations
Description: Vulnerability in Cisco routers versions 8.2 through 9.1 allows remote attackers to bypass access control lists when extended IP access lists are used on certain interfaces, the IP route cache is enabled, and the access list uses the “established” keyword. Related CVE by CWENo related CWE found.Top CVE for VendorNo vendor taxonomy on this entry.Recently […]
Affected Versions:
❌ Vulnerable: 8.2 - 9.1
✅ Safe: ≥ 9.2
Exploit Difficulty: HARD
⏱️ Time to exploit: > 4 hours
🛠️ Required skills: Advanced security expertise
💰 Public exploits: Rare or not public
How to Fix:
1 Identify affected systems
- Check if you're running the affected product
- Verify version (vulnerable: 8.2 - 9.1)
2 Immediate actions
- Update to ≥ 9.2 or later
- If patching is not immediately possible: restrict network exposure, apply least-privilege access
3 Verification
- Test the fix in a staging environment first
- Review logs for signs of exploitation
- Monitor for IOCs (Indicators of Compromise)
4 Long-term prevention
- Enable automatic security updates
- Set up vulnerability monitoring
- Review and harden security configurations
CWE: NVD-CWE-Other
Exploit Difficulty Assessment
HARD
Time to Exploit: > 4 hours
Skills Required: Advanced security expertise
Public Exploits: Rare or not public
Affected Versions
Vulnerable: 8.2 - 9.1
Safe: ≥ 9.2
Vulnerability Timeline
Dec 10, 1992
Vulnerability Published
CVE details first published to NVD database
Apr 03, 2025
Last Modified
CVE details were updated
Oct 30, 2025
Imported to Database
Added to this CVE tracking system
Detection Rules & IOCs
No specific detection rules generated for this vulnerability type.
No vendor/product data available.
- http://www.cert.org/advisories/CA-1992-20.html [Patch, Third Party Advisory, US Government Resource]
- http://www.securityfocus.com/bid/53 [Patch, Vendor Advisory]
- http://www.cert.org/advisories/CA-1992-20.html [Patch, Third Party Advisory, US Government Resource]
- http://www.securityfocus.com/bid/53 [Patch, Vendor Advisory]