Which products and versions are affected by CVE-2018-0175?

Affected: IOS (Cisco) versions 15.4\(3\)m4.1; IOS Xe (Cisco) versions 15.4\(3\)m4.1; IOS Xr (Cisco) versions 15.4\(3\)m4.1, among others. The full list is in the CVE brief.

Is CVE-2018-0175 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 3, 2022.

Is CVE-2018-0175 in the CISA KEV catalog?

Yes. It was added on Mar 3, 2022 with a federal remediation due date of Mar 17, 2022.

Is there a public exploit for CVE-2018-0175?

Public exploit code is available.

Is there a fix for CVE-2018-0175?

Fixed versions are available, including IOS <=15.2\(4a\)ea5, IOS Xe <=15.2\(4a\)ea5, IOS 15.2\(4a\)ea5.

How urgently should CVE-2018-0175 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2018-0175

Q: How urgently should CVE-2018-0175 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

HighExploitedPublic exploit

Format String vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition or execute arbitrary code with…

Published Mar 28, 2018 · Updated Jan 14, 2026

Key Facts

Patch immediately

CVE-2018-0175 is a high-severity vulnerability (CVSS 8.0 v3.1) affecting IOS (Cisco), IOS Xe (Cisco), IOS Xr (Cisco) and 1 more product.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 3, 2022. Public exploit code is available.
EPSS estimates a 3.5% probability of exploitation in the next 30 days.
Fixed versions are available, including IOS <=15.2\(4a\)ea5, IOS Xe <=15.2\(4a\)ea5, IOS 15.2\(4a\)ea5.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

8.0

CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

3.5%

Higher than 88.9% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2018-0175 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Mar 3, 2022	Mar 17, 2022	Not reported
Industry KEV feed	Mar 3, 2022	Mar 17, 2022	Not reported
CIRCL KEV	Mar 3, 2022	Mar 17, 2022	Not reported
ENISA EUVD	Mar 3, 2022	n/a	Not reported

Required action: Apply updates per vendor instructions.

Affected Products

6 affected entries in total

Product	Affected versions	Fixed in
IOSCisco	15.4\(3\)m4.1	15.2\(4a\)ea5
IOS XeCisco	15.4\(3\)m4.1	15.2\(4a\)ea5
IOS XrCisco	15.4\(3\)m4.1	n/a
Cisco IOS, IOS XE, and IOS XR	>= Cisco IOS, IOS XE, and IOS XR	n/a

Patched Releases

IOS

<=15.2\(4a\)ea5

IOS Xe

<=15.2\(4a\)ea5

Timeline

Publicly disclosed
Mar 28, 2018
Added to CISA KEV
Mar 3, 2022
Added to Industry KEV feed
Mar 3, 2022
Added to CIRCL KEV
Mar 3, 2022
Added to ENISA EUVD
Mar 3, 2022
Last updated
Jan 14, 2026

Weakness Type

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-134 Use of Externally-Controlled Format String

References

4 more references in the full CVE brief

FAQ

Common Questions.

Format String vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition or execute arbitrary code with elevated privileges on an affected devi…
Affected: IOS (Cisco) versions 15.4\(3\)m4.1; IOS Xe (Cisco) versions 15.4\(3\)m4.1; IOS Xr (Cisco) versions 15.4\(3\)m4.1, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 3, 2022.
Yes. It was added on Mar 3, 2022 with a federal remediation due date of Mar 17, 2022.
Public exploit code is available.
Fixed versions are available, including IOS <=15.2\(4a\)ea5, IOS Xe <=15.2\(4a\)ea5, IOS 15.2\(4a\)ea5.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Is CVE-2018-0175 Running On Your Attack Surface?

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