SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2018-8474

A security feature bypass vulnerability exists when Lync for Mac 2011 fails to properly sanitize specially crafted messages, aka "Lync for Mac 2011 Security Feature Bypass Vulnerability." This affects Microsoft Lync.

EXPLOIT ✓HIGH 7.5EPSS 38.2%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 38.2%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.

Description

A security feature bypass vulnerability exists when Lync for Mac 2011 fails to properly sanitize specially crafted messages, aka "Lync for Mac 2011 Security Feature Bypass Vulnerability." This affects Microsoft Lync.

CVSS 3.0
7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
38.18% probability · 99th percentile
Public exploits
1 in Exploit-DB · verified · first 4 December 2018
CISA KEV
Not listed
Weakness
CWE-20
Affected
microsoft/lync for mac
Source
secure@microsoft.com
EPSS trend
0%30%60%21 September 2026: 55.35%22 September 2026: 38.18%27 October 2026: 38.18%21 September 202627 October 2026

EPSS moved from 55.4% on 21 September 2026 to 38.2% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-45936source ↗Microsoft Lync for Mac 2011 - Injection Forced Browsing/Downloadwindows · nyxgeekdos4 December 2018yes

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.