CVE-2021-27651

CRITICALNVD 9.89.8—Elevated

9.8

In versions 8.2.1 through 8.5.2 of Pega Infinity, the password reset functionality for local accounts can be used to bypass local authentication checks.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 99.7%
KEV: Not listed

Published

April 29, 2021

Last Modified

November 21, 2024

References (2)

security@pegahttps://collaborate.pega.com/discussion/pega-security-advisory-a21-hotfix-matrix
af854a3a-2127-422b-91ae-364da2661108https://collaborate.pega.com/discussion/pega-security-advisory-a21-hotfix-matrix

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-287Improper Authentication

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 22:45 UTCepss_batch
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2026-05-31 22:29 UTCepss_batch
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Publicly available exploits

(3 references)

Working exploit code is in the public domain (2 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCsamwcyo/CVE-2021-27651-PoC
First seen May 16, 2021
RCE for Pega Infinity >= 8.2.1, Pega Infinity <= 8.5.2
Open source ↗
GitHub PoCVulnmachines/CVE-2021-27651
First seen May 16, 2021
Pega Infinity Password Reset
Open source ↗
Nucleihttp/cves/2021/CVE-2021-27651.yaml
First seen Jan 1, 2021
Pega Infinity - Authentication Bypass
Open source ↗

Frequently asked(5)

What is CVE-2021-27651?

CVE-2021-27651 is a critical vulnerability published on April 29, 2021. In versions 8.2.1 through 8.5.2 of Pega Infinity, the password reset functionality for local accounts can be used to bypass local authentication checks.

When was CVE-2021-27651 disclosed?

CVE-2021-27651 was first published in the National Vulnerability Database on April 29, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-27651 actively exploited?

CVE-2021-27651 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-27651?

CVE-2021-27651 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-27651?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-27651, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-27651

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-27651?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)