CVE-2021-20023
SonicWall Email Security: Path Traversal
As of , CVE-2021-20023 in SonicWall Email Security is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 3 November 2021
- US federal deadline
- 17 November 202114 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Known
- EPSS score
- 0.52Higher than 98% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- Not availableCISA listed it before 4 February 2022, where the EPSS files we read begin.
- Public exploit
- None foundNeither Metasploit nor Exploit-DB lists one.
- Fix
- No vendor link in CISA's entry
What CISA says to do
Apply updates per vendor instructions.
CISA's required action
What the flaw is
SonicWall Email Security contains a path traversal vulnerability that allows a post-authenticated attacker to read files on the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20021 and CVE-2021-20022 to achieve privilege escalation.
CISA's description
SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to read an arbitrary file on the remote host.
The CVE record's description, from sonicwall
- CVE published
- 20 April 2021
- Assigned by
- sonicwall
- CVSS
- 4.9 Medium (CVSS 3.1, from CISA-ADP)
- CWE-22
- Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- yes
- CISA SSVC, technical impact
- total
EPSS since listing
Show the numbers
| From | EPSS |
|---|---|
| 0.51 | |
| 0.52 |
Timeline
- The CVE record was published.
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
SonicWall Email Security: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2021-20021Improper Privilege Management | SonicWall SonicWall Email Security | Patch this weekRansomware use; EPSS 0.89 | 0.89 | ||
| CVE-2021-20022Unrestricted Upload of File | SonicWall SonicWall Email Security | Patch this weekRansomware use | 0.17 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org