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CVE-2021-27651

70
FAUCET Score

CVE-2021-27651 describes a critical authentication bypass vulnerability in Pega Infinity versions 8.2.1 through 8.5.2, allowing attackers to circumvent local authentication via the password reset functionality. With a CVSS score of 9.8 (Critical), this vulnerability is remotely exploitable with low complexity, enabling full compromise of confidentiality, integrity, and availability. While not listed on CISA's KEV catalog, a Nuclei template exists for detection, and its high EPSS and FAUCET scores indicate a significant likelihood of exploitation despite no observed active exploitation or public discussion.

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.2.1, <= 8.5.2CPE matchmatch criteria
cpe:2.3:a:pega:infinity:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
53.84%
Probability of exploitation in next 30 days
EPSS Percentile
98.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2021-27651 · May 16, 2021
This CVE's current EPSS score of 0.5384 is in the 97th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

collaborate.pega.com / discussion/pega-security-advisory-a21-hotfix-matrix
Release NotesVendor Advisory