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CVE Record

CVE-2021-27623: SAP Internet Graphics Service, versions - 7.20,7.20EXT,7.53,7.20_EX2,7.81, allows an unauthenticated attack...

SAP Internet Graphics Service, versions - 7.20,7.20EXT,7.53,7.20_EX2,7.81, allows an unauthenticated attacker after retrieving an existing system state value can submit a malicious IGS request over a network which due to insufficient input validation in method CXmlUtility::CheckLength() which will trigger an internal memory corruption error in the system causing the system to crash and rendering it unavailable. In this attack, no data in the system can be viewed or modified.

MediumCVSS 5.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This flaw can let an unauthenticated network attacker crash SAP Internet Graphics Service after obtaining an existing system state value. Sources describe denial of service only: data cannot be viewed or modified, but the service can become unavailable.

Executive priority

Treat this as a moderate availability risk. It does not expose or alter data according to the sources, but outages in SAP graphics services could disrupt dependent business processes. Remediate during normal SAP patch governance unless the service is exposed or business-critical.

Technical view

CVE-2021-27623 is insufficient input validation in CXmlUtility::CheckLength() in SAP Internet Graphics Service 7.20, 7.20EXT, 7.53, 7.20_EX2, and 7.81. A malicious IGS request can trigger internal memory corruption and crash the system.

Likely exposure

Exposure is likely limited to organizations running affected SAP Internet Graphics Service versions, especially where IGS is reachable over a network by unauthenticated users. The source bundle does not identify broader product dependencies or internet exposure patterns.

Exploitation context

The CVSS vector is network-based, unauthenticated, and requires no user interaction, but attack complexity is high. The source bundle and KEV status do not support claims of active exploitation.

Researcher notes

The key condition is retrieval of an existing system state value before sending a malicious IGS request. Available public details are limited, and the SAP note may require authorized access. Avoid assuming exploit maturity or specific fixes beyond SAP guidance.

Mitigation direction

  • Review SAP Note 3021050 and apply vendor-recommended updates or corrections.
  • Restrict network access to SAP Internet Graphics Service where business requirements allow.
  • Prioritize affected IGS instances supporting critical SAP business workflows.
  • Monitor vendor advisories for any updated mitigation or patch details.

Validation and detection

  • Inventory SAP Internet Graphics Service versions across SAP landscapes.
  • Check whether versions 7.20, 7.20EXT, 7.53, 7.20_EX2, or 7.81 are present.
  • Confirm SAP Note 3021050 guidance has been reviewed and applied where relevant.
  • Review availability incidents or crash logs for unexpected IGS failures.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-787: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2021-27623 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.9 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.9CVSS 3.0MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H2.23.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.9Medium
CVSS 3.0 vector shape for CVE-2021-27623Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
SAP SESAP Internet Graphics Service< 7.20, < 7.20EXT, < 7.53, < 7.20_EX2, < 7.81Listed
Weakness

CWE details

CWE-787

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.