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TI-1999-00158 Aliases CVE-1999-0160GHSA-rx39-mff5-f3vv

Some classic Cisco IOS devices have a vulnerability in the PPP CHAP authentication to…

Priority LOW 35Published · 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
Partial · Partial · Partial
Fix status
No fix listed

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

Summary

Some classic Cisco IOS devices have a vulnerability in the PPP CHAP authentication to establish unauthorized PPP connections.

Why it matters now

EPSS 0.01223 68th 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 · 7

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios:4.1:*:*:*:*:*:*:*4.1VulnerableCisco
cpe:2.3:o:cisco:ios:9.1:*:*:*:*:*:*:*9.1VulnerableCisco
cpe:2.3:o:cisco:ios:10.3:*:*:*:*:*:*:*10.3VulnerableCisco
cpe:2.3:o:cisco:ios:11.0:*:*:*:*:*:*:*11.0VulnerableCisco
cpe:2.3:o:cisco:ios:11.1:*:*:*:*:*:*:*11.1VulnerableCisco
cpe:2.3:o:cisco:ios:11.2:*:*:*:*:*:*:*11.2VulnerableCisco
cpe:2.3:o:cisco:ios:11.2p:*:*:*:*:*:*:*11.2pVulnerableCisco
  • cpe:2.3:o:cisco:ios:4.1:*:*:*:*:*:*:* Versions 4.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:9.1:*:*:*:*:*:*:* Versions 9.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:10.3:*:*:*:*:*:*:* Versions 10.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.1:*:*:*:*:*:*:* Versions 11.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.2:*:*:*:*:*:*:* Versions 11.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.2p:*:*:*:*:*:*:* Versions 11.2p Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-1999-0160
  2. 2026-10-03 Alias added: GHSA-rx39-mff5-f3vv

References

Other 1

  • TI-2018-00138 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-09019 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
  • TI-2017-04499 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
  • TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
See all 617 →

Sources

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