CVE-2021-27857 | FatPipe software allows unauthenticated configuration download

A missing authorization vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 10.2.2r42 allows a remote, unauthenticated attacker to download a configuration archive. The attacker needs to know or correctly guess the hostname of the target system since the hostname is used as part of the configuration archive file name. Older versions of FatPipe software may also be vulnerable. The FatPipe advisory identifier for this vulnerability is FPSA003.

Published: 2021-12-15 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-27857 is rated Moderate Risk (57.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.79%). EPSS rose +1.29% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-27857

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.50% 1.79% +1.29%
2 2025-03-30 0.98% 0.50% -0.47%
3 2025-03-29 — 0.98% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-27857

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2021-27857

Affected software / configurations for CVE-2021-27857

Vendor Product Version Raw CPE
fatpipeinc ipvpn_firmware 5.2.0 cpe:2.3:o:fatpipeinc:ipvpn_firmware:5.2.0:r34:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 6.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:6.1.2:r70p26:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 6.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:6.1.2:r70p45-m:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 6.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:6.1.2:r70p75-m:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 7.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:7.1.2:r39:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r129:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r144:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r150:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r156:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r161p12:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r161p16:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r161p17:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r161p2:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r161p20:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r161p26:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r161p3:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r164:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r164p4:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r164p5:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r165:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r180p2:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:9.1.2:r185:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:10.1.2:r60p10:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:10.1.2:r60p13:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:10.1.2:r60p32:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:10.1.2:r60p35:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:10.1.2:r60p45:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:10.1.2:r60p55:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:10.1.2:r60p58:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:10.1.2:r60p58s1:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:10.1.2:r60p65:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:10.1.2:r60p71:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:10.1.2:r60p82:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 10.2.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:10.2.2:r10:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 10.2.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:10.2.2:r25:*:*:*:*:*:*
fatpipeinc ipvpn_firmware 10.2.2 cpe:2.3:o:fatpipeinc:ipvpn_firmware:10.2.2:r38:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 5.2.0 cpe:2.3:o:fatpipeinc:mpvpn_firmware:5.2.0:r34:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 6.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:6.1.2:r70p26:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 6.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:6.1.2:r70p45-m:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 6.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:6.1.2:r70p75-m:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 7.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:7.1.2:r39:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r129:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r144:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r150:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r156:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r161p12:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r161p16:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r161p17:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r161p2:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r161p20:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r161p26:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r161p3:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r164:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r164p4:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r164p5:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r165:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r180p2:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 9.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:9.1.2:r185:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:10.1.2:r60p10:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:10.1.2:r60p13:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:10.1.2:r60p32:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:10.1.2:r60p35:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:10.1.2:r60p45:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:10.1.2:r60p55:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:10.1.2:r60p58:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:10.1.2:r60p58s1:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:10.1.2:r60p65:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:10.1.2:r60p71:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 10.1.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:10.1.2:r60p82:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 10.2.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:10.2.2:r10:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 10.2.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:10.2.2:r25:*:*:*:*:*:*
fatpipeinc mpvpn_firmware 10.2.2 cpe:2.3:o:fatpipeinc:mpvpn_firmware:10.2.2:r38:*:*:*:*:*:*
fatpipeinc warp_firmware 5.2.0 cpe:2.3:o:fatpipeinc:warp_firmware:5.2.0:r34:*:*:*:*:*:*
fatpipeinc warp_firmware 6.1.2 cpe:2.3:o:fatpipeinc:warp_firmware:6.1.2:r70p26:*:*:*:*:*:*
fatpipeinc warp_firmware 6.1.2 cpe:2.3:o:fatpipeinc:warp_firmware:6.1.2:r70p45-m:*:*:*:*:*:*
fatpipeinc warp_firmware 6.1.2 cpe:2.3:o:fatpipeinc:warp_firmware:6.1.2:r70p75-m:*:*:*:*:*:*
fatpipeinc warp_firmware 7.1.2 cpe:2.3:o:fatpipeinc:warp_firmware:7.1.2:r39:*:*:*:*:*:*
fatpipeinc warp_firmware 9.1.2 cpe:2.3:o:fatpipeinc:warp_firmware:9.1.2:r129:*:*:*:*:*:*
fatpipeinc warp_firmware 9.1.2 cpe:2.3:o:fatpipeinc:warp_firmware:9.1.2:r144:*:*:*:*:*:*
fatpipeinc warp_firmware 9.1.2 cpe:2.3:o:fatpipeinc:warp_firmware:9.1.2:r150:*:*:*:*:*:*

References for CVE-2021-27857

cvelogic Threat Intelligence