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TI-1999-00157 Aliases CVE-1999-0159GHSA-wrp8-556f-jx6r

Attackers can crash a Cisco IOS router or device, provided they can get to an interactive…

Priority LOW 19CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-400.

Summary

Attackers can crash a Cisco IOS router or device, provided they can get to an interactive prompt (such as a login). This applies to some IOS 9.x, 10.x, and 11.x releases.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01101 65th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

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

CPE configurations NVD · 16

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios:9.1:*:*:*:*:*:*:*9.1VulnerableCisco
cpe:2.3:o:cisco:ios:11.0\(20.3\):*:*:*:*:*:*:*11.0(20.3)VulnerableCisco
cpe:2.3:o:cisco:ios:11.1\(15\)ca:*:*:*:*:*:*:*11.1(15)caVulnerableCisco
cpe:2.3:o:cisco:ios:11.1\(16\):*:*:*:*:*:*:*11.1(16)VulnerableCisco
cpe:2.3:o:cisco:ios:11.1\(16\)aa:*:*:*:*:*:*:*11.1(16)aaVulnerableCisco
cpe:2.3:o:cisco:ios:11.1\(16\)ia:*:*:*:*:*:*:*11.1(16)iaVulnerableCisco
cpe:2.3:o:cisco:ios:11.1\(17\)cc:*:*:*:*:*:*:*11.1(17)ccVulnerableCisco
cpe:2.3:o:cisco:ios:11.1\(17\)ct:*:*:*:*:*:*:*11.1(17)ctVulnerableCisco
cpe:2.3:o:cisco:ios:11.2\(8\)sa3:*:*:*:*:*:*:*11.2(8)sa3VulnerableCisco
cpe:2.3:o:cisco:ios:11.2\(9\)p:*:*:*:*:*:*:*11.2(9)pVulnerableCisco
  • cpe:2.3:o:cisco:ios:9.1:*:*:*:*:*:*:* Versions 9.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.0\(20.3\):*:*:*:*:*:*:* Versions 11.0(20.3) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.1\(15\)ca:*:*:*:*:*:*:* Versions 11.1(15)ca Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.1\(16\):*:*:*:*:*:*:* Versions 11.1(16) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.1\(16\)aa:*:*:*:*:*:*:* Versions 11.1(16)aa Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.1\(16\)ia:*:*:*:*:*:*:* Versions 11.1(16)ia Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.1\(17\)cc:*:*:*:*:*:*:* Versions 11.1(17)cc Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.1\(17\)ct:*:*:*:*:*:*:* Versions 11.1(17)ct Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.2\(8\)sa3:*:*:*:*:*:*:* Versions 11.2(8)sa3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.2\(9\)p:*:*:*:*:*:*:* Versions 11.2(9)p Vulnerable ·Cisco
Show 6 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios:11.2\(9\)xa:*:*:*:*:*:*:*11.2(9)xaVulnerableCisco
cpe:2.3:o:cisco:ios:11.2\(10\):*:*:*:*:*:*:*11.2(10)VulnerableCisco
cpe:2.3:o:cisco:ios:11.2\(10\)bc:*:*:*:*:*:*:*11.2(10)bcVulnerableCisco
cpe:2.3:o:cisco:ios:11.3\(1\):*:*:*:*:*:*:*11.3(1)VulnerableCisco
cpe:2.3:o:cisco:ios:11.3\(1\)ed:*:*:*:*:*:*:*11.3(1)edVulnerableCisco
cpe:2.3:o:cisco:ios:11.3\(1\)t:*:*:*:*:*:*:*11.3(1)tVulnerableCisco
  • cpe:2.3:o:cisco:ios:11.2\(9\)xa:*:*:*:*:*:*:* Versions 11.2(9)xa Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.2\(10\):*:*:*:*:*:*:* Versions 11.2(10) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.2\(10\)bc:*:*:*:*:*:*:* Versions 11.2(10)bc Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.3\(1\):*:*:*:*:*:*:* Versions 11.3(1) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.3\(1\)ed:*:*:*:*:*:*:* Versions 11.3(1)ed Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:11.3\(1\)t:*:*:*:*:*:*:* Versions 11.3(1)t Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-1999-0159
  2. 2026-10-03 Alias added: GHSA-wrp8-556f-jx6r

References

—

  • 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