No exploitation reportedFix available

CVE-2021-27906

Q: Is CVE-2021-27906 actively exploited?

Active exploitation of CVE-2021-27906 has not been confirmed. Its EPSS score was 3.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-27906?

CVE-2021-27906 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2021-03-19
Fixed in2.0.23
WeaknessCWE-789

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A carefully crafted PDF file can trigger an OutOfMemory-Exception while loading the file. This issue affects Apache PDFBox version 2.0.22 and prior 2.0.x versions.

Timeline

dates in UTC

2021-03-1916:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-27906?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-27906?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV · NVD

pdfbox

Branch	Affected	Fixed in	Source
2.0	≥ 2.0.0, < 2.0.23	2.0.23	OSV

Oracle retail xstore point of service

Branch	Affected	Fixed in	Source
16.0	= 16.0.6	no fix published	NVD
17.0	= 17.0.4	no fix published	NVD
18.0	= 18.0.3	no fix published	NVD
19.0	= 19.0.2	no fix published	NVD
20.0	= 20.0.1	no fix published	NVD

Oracle primavera unifier

Branch	Affected	Fixed in	Source
17.x	≥ 17.7, ≤ 17.12	no fix published	NVD
18.8	= 18.8	no fix published	NVD
19.12	= 19.12	no fix published	NVD
20.12	= 20.12	no fix published	NVD

17 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update pdfbox to 2.0.23

Advisories and patches

www.openwall.comVendor Advisory
lists.apache.orgVendor Advisory
www.oracle.comPatch
www.oracle.comPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.15.5read 2026-10-23
NVDCVSS 2.04.3read 2026-10-23
CNAweakness (CWE)CWE-789read 2026-10-23
FIRST EPSSEPSS score3.3 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published: 2021-03-19
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-27906?

A carefully crafted PDF file can trigger an OutOfMemory-Exception while loading the file. This issue affects Apache PDFBox version 2.0.22 and prior 2.0.x versions.

Is CVE-2021-27906 actively exploited?

Active exploitation of CVE-2021-27906 has not been confirmed. Its EPSS score was 3.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-27906?

CVE-2021-27906 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

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