CVE-2021-27860: FatPipe WARP, IPVPN, and MPVPN Configuration Upload exploit
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 10 Jan 2022, 33 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 39.7%
EPSS score, percentile 98.6 of all scored records
- How severe?
- 9.8 Critical
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA deadline 24 Jan 2022. Apply updates per vendor instructions.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- from 10.1 to before 10.1.2r60p92
- from 10.2 to before 10.2.2r44p1
- from 10.1 to before 10.1.2r60p92
- from 10.2 to before 10.2.2r44p1
- from 10.1 to before 10.1.2r60p92
- from 10.2 to before 10.2.2r44p1
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
What to do
Required action, set by CISA
Apply updates per vendor instructions.
CISA due date for this action: 24 January 2022.
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | from 10.1 to before 10.1.2r60p92 |
| Affected | from 10.2 to before 10.2.2r44p1 |
| Status | Versions |
|---|---|
| Affected | from 10.1 to before 10.1.2r60p92 |
| Affected | from 10.2 to before 10.2.2r44p1 |
| Status | Versions |
|---|---|
| Affected | from 10.1 to before 10.1.2r60p92 |
| Affected | from 10.2 to before 10.2.2r44p1 |
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
About this vulnerability
A vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN software allows a remote, unauthenticated attacker to upload a file to any location on the filesystem.
Summary: CISA's KEV catalog, as of 28 Oct 2026.
- CISA added CVE-2021-27860 to its Known Exploited Vulnerabilities (KEV) catalog on 10 Jan 2022.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 24 Jan 2022.
- The CVE record was published on 8 Dec 2021, 33 days before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 9.8 (Critical), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 39.7% (percentile 98.6), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.
Description
Arbitrary file upload vulnerability in FatPipe software
A vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p92 and 10.2.2r44p1 allows a remote, unauthenticated attacker to upload a file to any location on the filesystem. The FatPipe advisory identifier for this vulnerability is FPSA006.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Weakness
- CWE-434: Unrestricted Upload of File with Dangerous Type
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| 8 Dec 2021 | CVE record published |
| 10 Jan 2022 | Added to CISA KEV |
| 24 Jan 2022 | CISA due date for the required action |
| 21 Oct 2025 | CVE record last updated |