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CVE-2021-1530

22
FAUCET Score

CVE-2021-1530 is an XML External Entity (XXE) vulnerability in the web-based management interface of Cisco BroadWorks Messaging Server Software. An authenticated, remote attacker can exploit this by uploading a crafted XML file. This allows for sensitive information disclosure from the local system or a partial denial of service by consuming system resources. Rated 7.1 HIGH CVSS, it has low attack complexity and requires no user interaction. Currently, there is no known public exploit code, active exploitation, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
22.0CPE matchmatch criteria
cpe:2.3:a:cisco:broadworks_messaging_server:22.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.11%
Probability of exploitation in next 30 days
EPSS Percentile
62.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0112 is in the 59th percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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-bwms-xxe-uSLrZgKs
Vendor Advisory