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TI-1999-00793 Aliases CVE-1999-0843GHSA-c2pq-hgr4-43fm

Denial of service in Cisco routers running NAT via a PORT command from an FTP client to a Telnet port.

Priority LOW 26Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

Denial of service in Cisco routers running NAT via a PORT command from an FTP client to a Telnet port.

Why it matters now

EPSS 0.0136 71st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:h:cisco:router:*:*:*:*:*:*:*:*all versionsVulnerableCisco
  • cpe:2.3:h:cisco:router:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-1999-0843
  2. 2026-10-03 Alias added: GHSA-c2pq-hgr4-43fm

References

—

  • TI-1999-01164 Cisco routers 9.17 and earlier allow remote attackers to bypass security restrictions via… CVSS 2.0HIGH 7.5
  • TI-1999-00448 An attacker can identify a CISCO device by sending a SYN packet to port 1999, which is… CVSS 2.0MEDIUM 5.0
  • TI-1999-00219 Denial of service in Cisco IOS web server allows attackers to reboot the router using a long URL. CVSS 2.0MEDIUM 5.0

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences