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CVE-2018-0158

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak or a reload of an affected device that leads to a denial of service (DoS) condition. The vu…

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A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak or a reload of an affected device that leads to a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device to be processed. A successful exploit could cause an affected device to continuously consume memory and eventually reload, resulting in a DoS condition. Cisco Bug IDs: CSCvf22394.
CVSS 8.6 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.3/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 8.6: +1.29
  • Fresh EPSS: 7.19%: +0.04

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 6 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Qualys
Press · 04 Sep 2023, 07:00 · Top 20 Vulnerabilities Exploited by Cyber Attackers - Qualys
Infosecurity Magazine
Press · 15 May 2020, 07:00 · The Most Exploited Vulnerabilities by State Sponsored Actors, and the Easy Fix - Infosecurity Magazine
Virus Bulletin
Press · 13 Mar 2020, 18:17 · VB2019 paper: Attribution is in the object: using RTF object dimensions to track APT phishing weaponizers - Virus Bulletin
Help Net Security
Press · 06 Feb 2020, 08:00 · Which vulnerabilities were most exploited by cybercriminals in 2019? - Help Net Security
Qualys
Press · 27 Dec 2019, 08:00 · Top 19+ Vulnerability CVEs in Santa’s Dashboard Tracking - Qualys
See all 6 source documents
Security Affairs
Press · 19 Apr 2018, 07:00 · Rockwell Automation Allen-Bradley Stratix and ArmorStratix switches are exposed to hack due to Cisco IOS flaws - Security Affairs

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.3 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 8.6; EPSS 7.2%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:57:54.561888+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
28 Mar 2018, 22:00
First press mention
19 Apr 2018, 07:00
Added to the CISA KEV catalog
03 Mar 2022, 00:00
Latest press mention
04 Sep 2023, 07:00
Score calculated
05 Nov 2026, 13:57