CVE-2021-33695

Traffic interception via certificate hostname mismatch

Published Sep 15, 2021 · Updated Aug 3, 2024

Improper certificate validation in SAP Cloud Connector before 2.0 allows man-in-the-middle attackers to read or modify backend traffic. The backend TLS connection accepts a certificate without sufficiently verifying that its hostname matches the intended endpoint. Exploitation requires an adjacent network position but no product credentials, and the published impact is limited to traffic confidentiality and integrity.

CVSS severity9.1
Critical
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in SAP Cloud Connector before 2.0 allows man-in-the-middle attackers to read or modify backend traffic. The backend TLS connection accepts a certificate without sufficiently verifying that its hostname matches the intended endpoint. Exploitation requires an adjacent network position but no product credentials, and the published impact is limited to traffic confidentiality and integrity.

The record

CVE
CVE-2021-33695
Published
Sep 15, 2021
Updated
Aug 3, 2024
Vendor
SAP SE
Product
SAP Cloud Connector
Classifications
CWE-295, CWE-297, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

SAP SE · SAP Cloud Connectorversion=< 2.0

Published CVSS scores

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.4NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:N
6.8SAP SECVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
CWE-297Improper Validation of Certificate with Host Mismatch
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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