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CVE-2021-27556

25
FAUCET Score

CVE-2021-27556 is a critical arbitrary code execution vulnerability affecting EasyCorp ZenTao version 12.5.3. An authenticated administrator can exploit this by manipulating the 'type' parameter in the Cron job tab, setting it to 'System' to execute arbitrary commands. With a CVSS score of 7.2 (High), this vulnerability allows for complete compromise of confidentiality, integrity, and availability of the affected system. There is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
12.5.3CPE matchmatch criteria
cpe:2.3:a:easycorp:zentao:12.5.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.01%
Probability of exploitation in next 30 days
EPSS Percentile
89.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0401 is in the 88th percentile among its peer group of 5,531 CVEs.

Social Chatter

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

Remediation records are not available for this CVE.

References

privasec.com / blog/zentao-cms-a-monkeys-journey-to-priv-esc-remote-code-execution
ExploitThird Party Advisory