CVE-2021-27610

SAP NetWeaver ABAP Server and ABAP Platform, versions - 700, 701, 702, 731, 740, 750, 751, 752, 753, 754, 755, 804, does not create information about internal and external RFC user in consistent and distinguished format, which could lead to improper authentication and may be exploited by malicious users to obtain illegitimate access to the system.

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

CVE-2021-27610 is rated High Risk (65.5/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.58%). EPSS rose +1.03% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize 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-2021-27610

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 0.55% 1.58% +1.03%
2 2025-11-21 0.29% 0.55% +0.26%
3 2025-11-18 — 0.29% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-27610

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 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:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.0 3.0 CRITICAL
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H 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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 6.0 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2021-27610

Affected software / configurations for CVE-2021-27610

Vendor Product Version Raw CPE
sap netweaver_abap 700 cpe:2.3:a:sap:netweaver_abap:700:*:*:*:*:*:*:*
sap netweaver_abap 701 cpe:2.3:a:sap:netweaver_abap:701:*:*:*:*:*:*:*
sap netweaver_abap 702 cpe:2.3:a:sap:netweaver_abap:702:*:*:*:*:*:*:*
sap netweaver_abap 731 cpe:2.3:a:sap:netweaver_abap:731:*:*:*:*:*:*:*
sap netweaver_abap 740 cpe:2.3:a:sap:netweaver_abap:740:*:*:*:*:*:*:*
sap netweaver_abap 750 cpe:2.3:a:sap:netweaver_abap:750:*:*:*:*:*:*:*
sap netweaver_abap 751 cpe:2.3:a:sap:netweaver_abap:751:*:*:*:*:*:*:*
sap netweaver_abap 752 cpe:2.3:a:sap:netweaver_abap:752:*:*:*:*:*:*:*
sap netweaver_abap 753 cpe:2.3:a:sap:netweaver_abap:753:*:*:*:*:*:*:*
sap netweaver_abap 754 cpe:2.3:a:sap:netweaver_abap:754:*:*:*:*:*:*:*
sap netweaver_abap 755 cpe:2.3:a:sap:netweaver_abap:755:*:*:*:*:*:*:*
sap netweaver_abap 804 cpe:2.3:a:sap:netweaver_abap:804:*:*:*:*:*:*:*
sap netweaver_application_server_abap 700 cpe:2.3:a:sap:netweaver_application_server_abap:700:*:*:*:*:*:*:*
sap netweaver_application_server_abap 701 cpe:2.3:a:sap:netweaver_application_server_abap:701:*:*:*:*:*:*:*
sap netweaver_application_server_abap 702 cpe:2.3:a:sap:netweaver_application_server_abap:702:*:*:*:*:*:*:*
sap netweaver_application_server_abap 731 cpe:2.3:a:sap:netweaver_application_server_abap:731:*:*:*:*:*:*:*
sap netweaver_application_server_abap 740 cpe:2.3:a:sap:netweaver_application_server_abap:740:*:*:*:*:*:*:*
sap netweaver_application_server_abap 750 cpe:2.3:a:sap:netweaver_application_server_abap:750:*:*:*:*:*:*:*
sap netweaver_application_server_abap 751 cpe:2.3:a:sap:netweaver_application_server_abap:751:*:*:*:*:*:*:*
sap netweaver_application_server_abap 752 cpe:2.3:a:sap:netweaver_application_server_abap:752:*:*:*:*:*:*:*
sap netweaver_application_server_abap 753 cpe:2.3:a:sap:netweaver_application_server_abap:753:*:*:*:*:*:*:*
sap netweaver_application_server_abap 754 cpe:2.3:a:sap:netweaver_application_server_abap:754:*:*:*:*:*:*:*
sap netweaver_application_server_abap 755 cpe:2.3:a:sap:netweaver_application_server_abap:755:*:*:*:*:*:*:*
sap netweaver_application_server_abap 804 cpe:2.3:a:sap:netweaver_application_server_abap:804:*:*:*:*:*:*:*

References for CVE-2021-27610

cvelogic Threat Intelligence