CVE-2022-42787

Wiesemann & Theis: Small number space for allocating session id in Com-Server family

HIGH
8.8
CVSS Score
Published: November 10, 2022 at 11:06 AM UTC
Updated: June 17, 2026 at 05:05 AM UTC
49 products affected across 2 vendorsCom Server Highspeed Oem FirmwareCom Server Highspeed Office 1PORT FirmwareCom Server Highspeed Isolated Firmware

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Severity
HIGH8.8
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

Description

Multiple W&T products of the Comserver Series use a small number space for allocating sessions ids. After login of an user an unathenticated remote attacker can brute force the users session id and get access to his account on the the device. As the user needs to log in for the attack to be successful a user interaction is required.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.48
Affected range stops below 1.48, so it looks safe — our inference, not a vendor statement
wut-at-modem-emulator (same device)
v < 1.48
Affected range stops below 1.48, so it looks safe — our inference, not a vendor statement
wut-com-server-20ma (same device)
v < 1.48
Affected range stops below 1.48, so it looks safe — our inference, not a vendor statement
wut-com-server (same device)
v < 1.76
Affected range stops below 1.76, so it looks safe — our inference, not a vendor statement
wut-com-server-highspeed-100basefx (same device)
v < 1.76
Affected range stops below 1.76, so it looks safe — our inference, not a vendor statement
wut-com-server-highspeed-100baselx (same device)
v < 1.76
Affected range stops below 1.76, so it looks safe — our inference, not a vendor statement
wut-com-server-highspeed-19-1port (same device)
v < 1.76
Affected range stops below 1.76, so it looks safe — our inference, not a vendor statement
wut-com-server-highspeed-19-4port (same device)
v < 1.76
Affected range stops below 1.76, so it looks safe — our inference, not a vendor statement
wut-com-server-highspeed-compact (same device)
v < 1.76
Affected range stops below 1.76, so it looks safe — our inference, not a vendor statement
wut-com-server-highspeed-industry (same device)
v < 1.76
Affected range stops below 1.76, so it looks safe — our inference, not a vendor statement
wut-com-server-highspeed-isolated (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHCERTVDE
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-330

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