A vulnerability has been identified in TIM 1531 IRC (All versions < V1.1).

published 2018-03-29 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-16627

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 4.7%; EPSS 4.7% chance of exploitation in 30 days, percentile 91%
public exploits: 0; none known

A vulnerability has been identified in TIM 1531 IRC (All versions < V1.1). A remote attacker with network access to port 80/tcp or port 443/tcp could perform administrative operations on the device without prior authentication. Successful exploitation could allow to cause a denial-of-service, or read and manipulate data as well as configuration settings of the affected device. At the stage of publishing this security advisory no public exploitation is known. Siemens provides mitigations to resolve it.

Patch / fix

fixed in 1

siemens tim_1531_irc_firmware 1.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-18-088-02 updated 2020-02-10 cvss 9.8

Siemens TIM 1531 IRC

Siemens TIM 1531 IRC (incl. SIPLUS NET variants) <V1.1
affected: fixed in V1.1, mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

4.73% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

Siemens AG TIM 1531 IRC

Classification

Weakness

CWE-303 Incorrect Implementation of Authentication Algorithm
CWE-287 Improper Authentication

References

cert-portal.siemens.com /productcert/pdf/ssa-110922.pdf
vendor-advisory
securityfocus.com /bid/103576
vdb-entry, broken-link, third-party-advisory

Sources

CVE List CVE-2018-4841
NVD CVE-2018-4841

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary