CISA ADP Vulnrichment

Answer in brief

CVE-2026-61911 records a Unknown severity vulnerability in CISA ADP Vulnrichment. The current sources do not mark it as known exploited. The current feed maps cyrusimap/Cyrus IMAP (generic), n/a/n/a (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 9, 2026Updated Sep 10, 2026Source checked Sep 10, 2026First seen by HOL Sep 9, 2026Material review Sep 10, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps cyrusimap/Cyrus IMAP (generic), n/a/n/a (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
cyrusimap/Cyrus IMAPgeneric	>=0 <3.8.8 \|\| >=3.9.0 <3.10.4 \|\| >=3.11.0 <3.12.4	3.8.8, 3.10.4, 3.12.4
n/a/n/ageneric	n/a	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for cyrusimap/Cyrus IMAP, n/a/n/a.
Review the reported fix. Update cyrusimap/Cyrus IMAP to 3.8.8 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 9, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 9, 2026

Sources and claim methodology

Upstream source description

An issue was discovered in Cyrus IMAP before 3.12.4. There is a Sieve mailbox existence oracle. An authenticated user could install a Sieve script that probed whether another user's private mailbox existed, or read the value of shared mailbox annotations, by observing which fileinto branch fired during LMTP delivery.

Quoted source text, attributed separately from HOL analysis.