CVE-2025-41762

Sensitive backup disclosure via weak wwwdnload.cgi hash

Published Mar 9, 2026 · Updated Mar 9, 2026

Weak backup hashing in MBS UBR-01 Mk II, UBR-02, and UBR-LON before 6.0.1.0 allows unauthenticated attackers to read credentials and private keys. The wwwdnload.cgi endpoint generates a backup protected by a weak hash, exposing web-interface password hashes and BACnet/SC and HTTPS private keys. The CNA rates access as local and unauthenticated; MBS describes backup access as requiring a user account, so reachability and privilege requirements differ between sources.

CVSS severity6.2
Medium
EPSS probability0.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak backup hashing in MBS UBR-01 Mk II, UBR-02, and UBR-LON before 6.0.1.0 allows unauthenticated attackers to read credentials and private keys. The wwwdnload.cgi endpoint generates a backup protected by a weak hash, exposing web-interface password hashes and BACnet/SC and HTTPS private keys. The CNA rates access as local and unauthenticated; MBS describes backup access as requiring a user account, so reachability and privilege requirements differ between sources.

The record

CVE
CVE-2025-41762
Published
Mar 9, 2026
Updated
Mar 9, 2026
Vendor
MBS GmbH
Product
UBR | LON
Classifications
CWE-328, T1552.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 9, 2026Record 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=0.0.0 <6.0.1.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

MBS GmbH · UBR | LONversion=0.0.0 <6.0.1.0
MBS GmbH · UBR-01 | Mk IIversion=0.0.0 <6.0.1.0
MBS GmbH · UBR-02version=0.0.0 <6.0.1.0

Published CVSS scores

6.2CERT VDECVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.5MBS GmbHCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-328Use of Weak Hash
T1552.004Unsecured Credentials: Private Keys

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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