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CVE-2019-15987

20
FAUCET Score

CVE-2019-15987 describes a username enumeration vulnerability in the web interfaces of multiple Cisco Webex products, including Event Center, Meeting Center, Support Center, and Training Center. This medium-severity vulnerability (CVSS 5.3) allows an unauthenticated, remote attacker to determine valid usernames and associated real names due to a lack of CAPTCHA protection during login attempts. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the vulnerability could still be leveraged for reconnaissance.

Impacted Technologies

VendorProductVersion(s)CPE
11.0.0CPE matchmatch criteria
cpe:2.3:a:cisco:webex_meetings_online:11.0.0:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:cisco:webex_meetings_server:4.0:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:cisco:webex_event_center:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:cisco:webex_meeting_center:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:cisco:webex_support_center:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.58%
Probability of exploitation in next 30 days
EPSS Percentile
73.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0158 is in the 57th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20191120-webex-centers-infodis
Vendor Advisory