CVE-2019-1761
Cisco IOS and IOS XE Software Hot Standby Router Protocol Information Leak Vulnerability
MEDIUM
4.3
CVSS Score
Published: March 28, 2019 at 12:25 AM UTC
Updated: June 17, 2026 at 02:29 AM UTC
2 products affected across 1 vendorIOSIOS Xe
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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.6%
SSVC
No known exploit
Description
A vulnerability in the Hot Standby Router Protocol (HSRP) subsystem of Cisco IOS and IOS XE Software could allow an unauthenticated, adjacent attacker to receive potentially sensitive information from an affected device. The vulnerability is due to insufficient memory initialization. An attacker could exploit this vulnerability by receiving HSRPv2 traffic from an adjacent HSRP member. A successful exploit could allow the attacker to receive potentially sensitive information from the adjacent device.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
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16.1.116.1.216.1.316.2.116.2.216.3.116.3.1a16.3.216.3.316.3.416.3.516.3.5b16.3.616.3.716.4.116.4.216.4.316.5.116.5.1a16.5.1b16.5.216.5.316.6.116.6.216.6.316.6.416.6.4a16.6.4s16.7.116.7.1a16.7.1b16.7.216.8.116.8.1a16.8.1b16.8.1c16.8.1d16.8.1e16.8.1s16.8.216.9.116.9.1a16.9.1b16.9.1c16.9.1d16.9.1s3.10.0E3.10.0S3.10.0cE3.10.0ce3.10.0e3.10.0s3.10.10S3.10.10s3.10.1E3.10.1S3.10.1aE3.10.1ae3.10.1e3.10.1s3.10.1sE3.10.1se3.10.2E3.10.2S3.10.2aS3.10.2as3.10.2e3.10.2s3.10.2tS3.10.2ts3.10.3S3.10.3s3.10.4S3.10.4s3.10.5S3.10.5s3.10.6S3.10.6s3.10.7S3.10.7s3.10.8S3.10.8aS3.10.8as3.10.8s3.10.9S3.10.9s3.11.0S3.11.0s3.11.1S3.11.1s3.11.2S3.11.2s3.11.3S3.11.3s3.11.4S3.11.4s3.12.0S3.12.0aS3.12.0as3.12.0s3.12.1S3.12.1s3.12.2S3.12.2s3.12.3S3.12.3s3.12.4S3.12.4s3.13.0S3.13.0aS3.13.0as3.13.0s3.13.10S3.13.10s3.13.1S3.13.1s3.13.2S3.13.2aS3.13.2as3.13.2s3.13.3S3.13.3s3.13.4S3.13.4s3.13.5S3.13.5aS3.13.5as3.13.5s3.13.6S3.13.6aS3.13.6as3.13.6bS3.13.6bs3.13.6s3.13.7S3.13.7aS3.13.7as3.13.7s3.13.8S3.13.8s3.13.9S3.13.9s3.14.0S3.14.0s3.14.1S3.14.1s3.14.2S3.14.2s3.14.3S3.14.3s3.14.4S3.14.4s3.15.0S3.15.0s3.15.1S3.15.1cS3.15.1cs3.15.1s3.15.2S3.15.2s3.15.3S3.15.3s3.15.4S3.15.4s3.16.0S3.16.0aS3.16.0as3.16.0bS3.16.0bs3.16.0cS3.16.0cs3.16.0s3.16.1S3.16.1aS3.16.1as3.16.1s3.16.2S3.16.2aS3.16.2as3.16.2bS3.16.2bs3.16.2s3.16.3S3.16.3aS3.16.3as3.16.3s3.16.4S3.16.4aS3.16.4as3.16.4bS3.16.4bs3.16.4cS3.16.4cs3.16.4dS3.16.4ds3.16.4eS3.16.4es3.16.4gS3.16.4gs3.16.4s3.16.5S3.16.5aS3.16.5as3.16.5bS3.16.5bs3.16.5s3.16.6S3.16.6bS3.16.6bs3.16.6s3.16.7S3.16.7aS3.16.7as3.16.7bS3.16.7bs3.16.7s3.16.8S3.16.8s3.17.0S3.17.0s3.17.1S3.17.1aS3.17.1as3.17.1s3.17.2S3.17.3S3.17.3s3.17.4S3.17.4s3.18.0S3.18.0SP3.18.0aS3.18.0as3.18.0s3.18.0sp3.18.1S3.18.1SP3.18.1aSP3.18.1asp3.18.1bSP3.18.1bsp3.18.1cSP3.18.1csp3.18.1gSP3.18.1gsp3.18.1hSP3.18.1hsp3.18.1iSP3.18.1isp3.18.1s3.18.1sp3.18.2S3.18.2SP3.18.2aSP3.18.2asp3.18.2s3.18.2sp3.18.3S3.18.3SP3.18.3aSP3.18.3asp3.18.3bSP3.18.3bsp3.18.3s3.18.3sp3.18.4S3.18.4SP3.18.4s3.18.4sp3.18.5SP3.18.5sp3.2.0JA3.2.0SE3.2.0SG3.2.0ja3.2.0se3.2.0sg3.2.10SG3.2.10sg3.2.11SG3.2.11sg3.2.1SE3.2.1SG3.2.1se3.2.1sg3.2.2SE3.2.2SG3.2.2se3.2.2sg3.2.3SE3.2.3SG3.2.3se3.2.3sg3.2.4SG3.2.4sg3.2.5SG3.2.5sg3.2.6SG3.2.6sg3.2.7SG3.2.7sg3.2.8SG3.2.8sg3.2.9SG3.2.9sg3.3.0SE3.3.0SG3.3.0SQ3.3.0XO3.3.0se3.3.0sg3.3.0sq3.3.0xo3.3.1SE3.3.1SG3.3.1SQ3.3.1XO3.3.1se3.3.1sg3.3.1sq3.3.1xo3.3.2SE3.3.2SG3.3.2XO3.3.2se3.3.2sg3.3.2xo3.3.3SE3.3.3se3.3.4SE3.3.4se3.3.5SE3.3.5se3.4.0SG3.4.0SQ3.4.0sg3.4.0sq3.4.1SG3.4.1SQ3.4.1sg3.4.1sq3.4.2SG3.4.2sg3.4.3SG3.4.3sg3.4.4SG3.4.4sg3.4.5SG3.4.5sg3.4.6SG3.4.6sg3.4.7SG3.4.7sg3.4.8SG3.4.8sg3.5.0E3.5.0SQ3.5.0e3.5.0sq3.5.1E3.5.1SQ3.5.1e3.5.1sq3.5.2E3.5.2SQ3.5.2e3.5.2sq3.5.3E3.5.3SQ3.5.3e3.5.3sq3.5.4SQ3.5.4sq3.5.5SQ3.5.5sq3.5.6SQ3.5.6sq3.5.7SQ3.5.7sq3.5.8SQ3.5.8sq3.6.0E3.6.0aE3.6.0ae3.6.0bE3.6.0be3.6.0e3.6.1E3.6.1e3.6.2E3.6.2aE3.6.2ae3.6.2e3.6.3E3.6.3e3.6.4E3.6.4e3.6.5E3.6.5aE3.6.5ae3.6.5bE3.6.5be3.6.5e3.6.6E3.6.6e3.6.7E3.6.7aE3.6.7ae3.6.7bE3.6.7be3.6.7e3.6.8E3.6.8e3.6.9E3.6.9aE3.6.9ae3.6.9e3.7.0E3.7.0S3.7.0bS3.7.0bs3.7.0e3.7.0s3.7.1E3.7.1S3.7.1aS3.7.1as3.7.1e3.7.1s3.7.2E3.7.2S3.7.2e3.7.2s3.7.2tS3.7.2ts3.7.3E3.7.3S3.7.3e3.7.3s3.7.4E3.7.4S3.7.4aS3.7.4as3.7.4e3.7.4s3.7.5E3.7.5S3.7.5e3.7.5s3.7.6S3.7.6s3.7.7S3.7.7s3.7.8S3.7.8s3.8.0E3.8.0S3.8.0e3.8.0s3.8.1E3.8.1S3.8.1e3.8.1s3.8.2E3.8.2S3.8.2e3.8.2s3.8.3E3.8.3e3.8.4E3.8.4e3.8.5E3.8.5aE3.8.5ae3.8.5e3.8.6E3.8.6e3.8.7E3.8.7e3.9.0E3.9.0S3.9.0aS3.9.0as3.9.0e3.9.0s3.9.1E3.9.1S3.9.1aS3.9.1as3.9.1e3.9.1s3.9.2E3.9.2S3.9.2bE3.9.2be3.9.2e3.9.2s
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
VDB Entryx_refsource_BIDBroken LinkThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/107620Vendor Advisoryx_refsource_CISCOPatch
Source: [email protected]
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-ios-infoleakSSVC — Action Prioritization
SSVCNo known exploitNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- ADJACENT_NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- LOW
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusANALYZED
CWE
CWE-665
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