CVE-2021-26476

FAUCET Score

CVE-2021-26476 is a critical OS command injection vulnerability affecting EPrints version 3.4.2, allowing remote attackers to execute arbitrary commands by submitting specially crafted LaTeX input to the cgi/cal?year= URI. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low attack complexity and no user interaction, leading to complete compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, its high severity warrants immediate patching.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		3.4.2CPE matchmatch criteria	cpe:2.3:a:eprints:eprints:3.4.2:::::::*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/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

3.1

Exploit Intelligence

EPSS Score

3.06%

Probability of exploitation in next 30 days

EPSS Percentile

86.2%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0306 is in the 78th 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

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference

View patch

References

files.eprints.org / 2548

PatchVendor Advisory

github.com / grymer/CVE/blob/master/eprints_security_review.pdf

ExploitPatchThird Party Advisory