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CVE-2021-1527

20
FAUCET Score

CVE-2021-1527 is a vulnerability in Cisco Webex Player for Windows and MacOS, stemming from insufficient validation of Webex Recording Format (WRF) files. An attacker could exploit this by tricking a user into opening a malicious WRF file, leading to a denial of service (software termination) or disclosure of memory state information. With a CVSS score of 6.1 (Medium), it requires local access and user interaction, but has low attack complexity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 41.5CPE matchmatch criteria
cpe:2.3:a:cisco:webex_player:*:*:*:*:*:macos:*:*
< 41.5CPE matchmatch criteria
cpe:2.3:a:cisco:webex_player:*:*:*:*:*:windows:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
1.8
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.58%
Probability of exploitation in next 30 days
EPSS Percentile
44.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0058 is in the 47th percentile among its peer group of 5,765 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 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-webex-player-kxtkFbnR
Vendor Advisory