CVE-2019-1761Cisco IOS and IOS XE Software Hot Standby Router Protocol Information Leak Vulnerability
- 4.3MediumCVSS base score
- 0.63%Exploitation in 30 daysEPSS · top 49% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By cisco
- 4 months later
· 4 months later
Published
- 6 years later
· 6 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ciscoCNA (assigner) | 3.0 | Medium4.3 | CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVDNVD · Analyzed | 3.1 | Medium4.3 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.63% · top 49% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Affected products
Cisco · Cisco IOS and IOS XE Software
- affected 3.2.0SG
- affected 3.2.1SG
- affected 3.2.2SG
- affected 3.2.3SG
- affected 3.2.4SG
- affected 3.2.5SG
- affected 3.2.6SG
- affected 3.2.7SG
- affected 3.2.8SG
- affected 3.2.9SG
- affected 3.2.10SG
- affected 3.2.11SG
- affected 3.7.0S
- affected 3.7.1S
- affected 3.7.2S
- affected 3.7.3S
- affected 3.7.4S
- affected 3.7.5S
- affected 3.7.6S
- affected 3.7.7S
- affected 3.7.8S
- affected 3.7.4aS
- affected 3.7.2tS
- affected 3.7.0bS
- affected 3.7.1aS
- affected 3.3.0SG
- affected 3.3.2SG
- affected 3.3.1SG
- affected 3.8.0S
- affected 3.8.1S
- affected 3.8.2S
- affected 3.9.1S
- affected 3.9.0S
- affected 3.9.2S
- affected 3.9.1aS
- affected 3.9.0aS
- affected 3.2.0SE
- affected 3.2.1SE
- affected 3.2.2SE
- affected 3.2.3SE
- and 232 more
What to do
Exploitation: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
References
References2
- 20190327 Cisco IOS and IOS XE Software Hot Standby Router Protocol Information Leak Vulnerability (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
- 107620 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-10318 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2019-1761)Record last updated .