LiveActive security incident?Get immediate response
CVE Record

CVE-2025-59032: ManageSieve AUTHENTICATE command crashes when using literal as SASL initial response.

ManageSieve AUTHENTICATE command crashes when using literal as SASL initial response. This can be used to crash ManageSieve service repeatedly, making it unavailable for other users. Control access to ManageSieve port, or disable the service if it's not needed. Alternatively upgrade to a fixed version. No publicly available exploits are known.

HighCVSS 7.5Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2025-59032 is a denial-of-service issue in ManageSieve handling of AUTHENTICATE. A remote unauthenticated request pattern can crash the ManageSieve service, potentially making sieve management unavailable to users. The sources do not report data theft or code execution.

Executive priority

Treat as high priority for exposed mail services because it can disrupt user access to mail-filter management. It is not currently described as exploited in the wild, but unauthenticated network denial of service warrants prompt containment and patch tracking.

Technical view

The flaw is improper input handling in ManageSieve AUTHENTICATE when a literal is used as the SASL initial response. CVSS 3.1 is 7.5, network exploitable, low complexity, no privileges or user interaction, with high availability impact only. CWEs listed are CWE-20 and CWE-229.

Likely exposure

Exposure is most likely where ManageSieve is enabled and reachable from untrusted networks. Systems with the service disabled or access limited to trusted administrative/user networks have materially lower exposure. The provided bundle does not clearly name affected version ranges or fixed versions.

Exploitation context

The bundle states no publicly available exploits are known and KEV is false. The vulnerability is still operationally relevant because repeated crashes could make the service unavailable without authentication if the ManageSieve port is exposed.

Researcher notes

Evidence is strongest for the crash condition, CVSS scoring, and recommended controls. Evidence is incomplete for exact affected version ranges and fixed versions in the supplied bundle. Avoid assuming broader Dovecot impact beyond the named OX Dovecot Pro and referenced Red Hat materials.

Mitigation direction

  • Restrict access to the ManageSieve port to trusted networks or users.
  • Disable ManageSieve if the service is not required.
  • Upgrade to a vendor-fixed version when applicable.
  • Check Open-Xchange and Red Hat advisories for affected package guidance.
  • Prioritize exposed mail infrastructure before internally restricted systems.

Validation and detection

  • Inventory systems running Dovecot or OX Dovecot Pro with ManageSieve enabled.
  • Confirm whether the ManageSieve listener is reachable from untrusted networks.
  • Map installed packages against Open-Xchange and Red Hat advisory data.
  • Verify the vendor-fixed package or version is installed where applicable.
  • Review service health monitoring for repeated ManageSieve crashes.
Prepared
Confidence
medium
Sources
12

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-20: 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.

Open ATT&CK lookup
cwe · low confidence lookup

CWE-229: 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.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2025-59032 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/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.

2CVSS vectors
5Timeline events
2ADP providers
19Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: partial

CVSS vector scores

2 official scores

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
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6OX
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2025-59032Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/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

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. ADP timelineredhat-SADP

    Made public.

  3. CVE publishedCVE Program

    The CVE record was published.

  4. ADP timelineredhat-SADP

    Reported to Red Hat.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPdovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command
other:Red Hat severity ratingcvssV3_1
  • 2026-03-27T09:01:32.610Z: Reported to Red Hat.
  • 2026-03-27T08:10:16.612Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Open-Xchange GmbHOX Dovecot Pro0, 0unaffected
Weakness

CWE details

CWE-20CWE-229

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