CVE-2022-27255: realtek ecos_msdk_firmware Improper Input Validation
CVSS: 9.8v3.1CriticalModified
Published 01-08-2022Last modified 03-08-2024
Vulnerability summary
CVE-2022-27255 is a critical (CVSS 9.8) Improper Input Validation vulnerability in realtek ecos_msdk_firmware. EPSS estimates a 36.70% chance of exploitation in the next 30 days, higher than 98.4% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
36.70%
0%100%
High · -0.38 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 01-08-2022PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
In Realtek eCos RSDK 1.5.7p1 and MSDK 4.9.4p1, the SIP ALG function that rewrites SDP data has a stack-based buffer overflow. This allows an attacker to remotely execute code without authentication via a crafted SIP packet that contains malicious SDP data.
CVSS metrics
2 scores · 1 source · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
36.70%
Chance of exploitation in the next 30 days
Percentile
98%
Versus all other CVEs
30-day change
-0.38 pp
From 37.08% on 19-09-2026
19-09-202619-10-2026
EPSS score36.70%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Realtek2 products
- ecos_msdk_firmware4.9.4p1
- ecos_rsdk_firmware1.5.7p1
1 vendor · 2 products
References
2 links- www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2022-27255.pdfX Refsource MISCVendor Advisory