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TI-2019-09461 Aliases CVE-2019-12665GHSA-23gj-4cxv-h5x2

Cisco IOS and IOS XE Software HTTP Client Information Disclosure Vulnerability

Priority LOW 35CWE-399Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.

Summary

A vulnerability in the HTTP client feature of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to read and modify data that should normally have been sent via an encrypted channel. The vulnerability is due to TCP port information not being considered when matching new requests to existing, persistent HTTP connections. An attacker could exploit this vulnerability by acting as a man-in-the-middle and then reading and/or modifying data that should normally have been sent through an encrypted channel.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01091 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
CiscoCisco IOS 12.2(15)Ball versions—No fix listedCNA
  • Cisco IOS 12.2(15)B VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios:15.6\(2\)t:*:*:*:*:*:*:*15.6(2)tVulnerableCisco
cpe:2.3:o:cisco:ios:fd-1.5.0:*:*:*:*:*:*:*fd-1.5.0VulnerableCisco
  • cpe:2.3:o:cisco:ios:15.6\(2\)t:*:*:*:*:*:*:* Versions 15.6(2)t Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:fd-1.5.0:*:*:*:*:*:*:* Versions fd-1.5.0 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-12665
  2. 2026-10-03 Alias added: GHSA-23gj-4cxv-h5x2

References

Advisory 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